LINZ Data Service :: tag:data.linz.govt.nz,2008-10:feed:data:mapstream=70004:category=301003:sort=rLand Information New Zealandhttps://data.linz.govt.nz//NZ Protected Survey Markstag:data.linz.govt.nz,2011-07:layers:508392011-07-22T02:48:16.995343+00:002024-03-17T12:15:01.337002+00:00
<a class="kxThumbnail" href="https://data.linz.govt.nz/layer/50839-nz-protected-survey-marks/" title="Details for NZ Protected Survey Marks"><img src="//tiles-cdn.koordinates.com/services/tiles/v4/thumbnail/layer=50839.399968,style=auto/90x70.png" alt="NZ Protected Survey Marks thumbnail"/></a><br />
<br /><strong>Updated with new data on 17 Mar 2024</strong><br />
<p>This layer identifies critical survey marks which Toitū Te Whenua (Land Information New Zealand) requires to be physically protected.</p>
<p>Thousands of vital survey marks exist in New Zealand. This layer identifies critical survey marks that should not be disturbed or destroyed.<br>
Like utilities such as cables and pipes, survey marks are valuable assets, predominately in the road reserve, with many survey marks set below or at ground level and therefore not highly visible or apparent. They often remain unnoticed until roads or footpaths have been excavated and the survey marks disturbed or destroyed.<br>
Publication of the NZ Protected Survey Marks dataset enables the potential for disturbance or destruction of these valuable survey marks to be assessed, and if needed, the marks protected prior to the commencement of any excavation work. </p>
<p>People involved in construction, from design to the works itself, are responsible for ensuring that survey marks are not disturbed or destroyed. When works have the potential to disturb or destroy existing cadastral and geodetic marks, Toitū Te Whenua needs to be notified so that it can assess whether the marks should be reinstated or replaced. Find out more about looking after the <a href="https://www.linz.govt.nz/data/geodetic-system/geodetic-control-network-development-maintenance-and-protection">national survey network</a>, and how to contact the Toitū Te Whenua <a href="https://www.linz.govt.nz/data/geodetic-services/search-for-geodetic-marks/survey-mark-protection">Survey Protection Advisory Service</a>.</p>
<p>Please note there may be other important survey marks not identified on this layer, and that Toitū Te Whenua recommends consultation with a Licensed Cadastral surveyor before any construction or earthworks begin.</p>
<p>If you notice a damaged survey mark, you can report it to Toitū Te Whenua by filling out a form on this <a href="https://www.linz.govt.nz/data/geodetic-services/search-for-geodetic-marks/survey-mark-protection">website</a>, or by sending feedback via the <a href="https://www.linz.govt.nz/data/geodetic-services/geodetic-marks-app">Geomarks App</a>.</p>
From: <a href="https://data.linz.govt.nz/group/ngo/" title="Profile for National Geodetic Office">National Geodetic Office</a><br />
Added: 22 Jul 2011<br />
Updated: 17 Mar 2024<br />
NZ Geodetic Vertical Markstag:data.linz.govt.nz,2011-05:layers:507842011-05-22T06:05:14.531284+00:002024-03-15T13:36:44.066993+00:00
<a class="kxThumbnail" href="https://data.linz.govt.nz/layer/50784-nz-geodetic-vertical-marks/" title="Details for NZ Geodetic Vertical Marks"><img src="//tiles-cdn.koordinates.com/services/tiles/v4/thumbnail/layer=50784.399956,style=auto/90x70.png" alt="NZ Geodetic Vertical Marks thumbnail"/></a><br />
<br /><strong>Updated with new data on 15 Mar 2024</strong><br />
<p>This dataset provides information about the position, height, height datum, height accuracy, mark name, mark type, condition and unique four letter identifier for geodetic marks that have an authoritative height in terms of a vertical datum. Heights are in datums defined at <a href="https://www.linz.govt.nz/guidance/geodetic-system/coordinate-systems-used-new-zealand/vertical-datums">www.linz.govt.nz/guidance/geodetic-system/coordina...</a> .</p>
<p>All marks will have positions in terms a 3D New Zealand official geodetic datum. The horizontal positions of marks are provided for approximate location purposes only .</p>
<p>This dataset only contains marks that are within the New Zealand mainland and offshore islands. The height data for these marks have been generated using precise levelling from datum tide gauges, or has been acquired by 3rd party sources either as levelling observations or direct heights.</p>
<p>The source data is from Toitū Te Whenua Land Information New Zealand's (LINZ) Landonline system where it is used by Land Surveyors. This dataset is updated daily to reflect changes made in the Landonline.</p>
<h4>Accuracy</h4>
<p>The accuracy of normal-orthometric heights are described by height orders.</p>
<p>For more information see <a href="https://www.linz.govt.nz/guidance/geodetic-system/coordinate-systems-used-new-zealand/coordinate-and-height-accuracy/height-orders">www.linz.govt.nz/guidance/geodetic-system/coordina...</a> .</p>
<p>Note the accuracy applies at the time the mark was last surveyed - see the geodetic database for historical information about height coordinates.</p>
From: <a href="https://data.linz.govt.nz/group/ngo/" title="Profile for National Geodetic Office">National Geodetic Office</a><br />
Added: 22 May 2011<br />
Updated: 15 Mar 2024<br />
NZ Survey Control Networkstag:data.linz.govt.nz,2011-05:layers:507862011-05-22T06:05:07.574046+00:002024-03-15T13:36:41.300452+00:00
<a class="kxThumbnail" href="https://data.linz.govt.nz/layer/50786-nz-survey-control-networks/" title="Details for NZ Survey Control Networks"><img src="//tiles-cdn.koordinates.com/services/tiles/v4/thumbnail/layer=50786.399955,style=auto/90x70.png" alt="NZ Survey Control Networks thumbnail"/></a><br />
<br /><strong>Updated with new data on 15 Mar 2024</strong><br />
<p>This dataset provides information about the survey control network, position, position accuracy, mark name, mark type, condition and unique four letter code for geodetic marks in terms of New Zealand's official geodetic datum, New Zealand Geodetic Datum 2000 (NZGD2000).</p>
<p>The dataset only contains marks that are within the New Zealand mainland and offshore islands. These positions have been generated using geodetic observations such as precise differential GPS or electronic distance and theodolite angle measurements. The positions are either 2D or 3D depending of the availability of this measurement data. </p>
<p>The source data is from Land Information New Zealand's (LINZ) Landonline system where it is used by Land Surveyors. This dataset is updated daily to reflect changes made in the Landonline.</p>
<p>The mark network is segmented into six control networks which provide control marks for specific purposes. The control_network field within this layer records this network with the 3 or 4 letter abbreviation code as follows:</p>
<pre><code>NRF - National Reference Frame
NDMN - National Deformation Monitoring Network
RDMN - Regional Deformation Monitoring Network
LDMN - Local Deformation Monitoring Network
CHN - Cadastral Horizontal Control Network
CVN - Cadastral Vertical Control Network
BGN - Basic Geospatial Network
NHN - National Height Network
</code></pre>
<p>Note a geodetic mark can be in more than network. Also not all geodetic marks are currently associated with a geodetic network. Those that are may be referred to as a control mark. For more information about the control networks refer to <a href="http://www.linz.govt.nz/geodetic/geodetic-programme/survey-control-networks/">www.linz.govt.nz/geodetic/geodetic-programme/surve...</a>. </p>
<h4>Accuracy</h4>
<p>Geodetic marks with a coordinate order of 5 or less have been positioned in terms of NZGD2000. Lower order marks (order 6 and greater) are derived from cadastral surveys, lower accuracy measurement techniques or inaccurate historical datum transformations, and may be significantly less accurate. </p>
<p>The accuracy of NZGD2000 coordinates is described by a series of 'orders' classifications. Positions in terms of NZGD2000 are described by three-dimensional coordinates (latitude, longitude, ellipsoidal height). The accuracy of a survey mark is indicated by its order. Orders are classifications based on the quality of the coordinate in relation to the datum and in relation to other surrounding marks. For more information see <a href="http://www.linz.govt.nz/geodetic/datums-projections-heights/heights/coordinate-orders/">www.linz.govt.nz/geodetic/datums-projections-heigh...</a> </p>
<p>Note that the accuracy applies at the time the mark was last surveyed. Refer to the web geodetic database for historical information about mark coordinates. </p>
<p>Note also that the existence of a mark in this dataset does not imply that there is currently a physical mark in the ground - the dataset includes destroyed or lost historical marks. The geodetic database provides more information on the mark status, valid at last time it was visited by LINZ or a maintenance contractor.</p>
From: <a href="https://data.linz.govt.nz/group/ngo/" title="Profile for National Geodetic Office">National Geodetic Office</a><br />
Added: 22 May 2011<br />
Updated: 15 Mar 2024<br />
NZ Geodetic Markstag:data.linz.govt.nz,2011-05:layers:507872011-05-22T06:05:15.135161+00:002024-03-15T13:36:38.979708+00:00
<a class="kxThumbnail" href="https://data.linz.govt.nz/layer/50787-nz-geodetic-marks/" title="Details for NZ Geodetic Marks"><img src="//tiles-cdn.koordinates.com/services/tiles/v4/thumbnail/layer=50787.399954,style=2088.1516910372/90x70.png" alt="NZ Geodetic Marks thumbnail"/></a><br />
<br /><strong>Updated with new data on 15 Mar 2024</strong><br />
<p>This dataset provides information about the position, position accuracy, mark name, mark type, condition and unique four letter code for geodetic marks in terms of a New Zealand's official geodetic datum.</p>
<p>The dataset only contains marks that are within the New Zealand mainland and offshore islands. These positions have been generated using geodetic observations such as precise differential GPS or electronic distance and theodolite angles measurements. The positions are either 2D or 3D depending of the availability of this measurement data.</p>
<p>The source data is from Toitū Te Whenua Land Information New Zealand's (LINZ) Landonline system where it is used by Land Surveyors. This dataset is updated daily to reflect changes made in the Landonline.</p>
<h4>Accuracy</h4>
<p>Geodetic marks with a coordinate order of 5 or less have been positioned in terms of NZGD2000. Lower order marks (order 6 and greater) are derived from cadastral surveys, lower accuracy measurement techniques or inaccurate historical datum transformations, and may be significantly less accurate.</p>
<p>The accuracy of NZGD2000 coordinates is described by a series of 'orders' classifications. Positions in terms of NZGD2000 are described by three-dimensional coordinates (latitude, longitude, ellipsoidal height). The accuracy of a survey mark is indicated by its Order. Orders are classifications based on the quality of the coordinate in relation to the datum and in relation to other surrounding marks. For more information <a href="https://www.linz.govt.nz/guidance/geodetic-system/coordinate-systems-used-new-zealand/coordinate-and-height-accuracy/coordinate-orders">see</a></p>
<p>Note that the accuracy applies at the time the mark was last surveyed. Refer to the web geodetic database for historical information about mark coordinates.</p>
<p>Note also that the existence of a mark in this dataset does not imply that there is currently a physical mark in the ground - the dataset includes destroyed or lost historical marks. The geodetic database provides more information on the mark status, valid at last time it was visited by LINZ or a maintenance contractor.</p>
From: <a href="https://data.linz.govt.nz/group/ngo/" title="Profile for National Geodetic Office">National Geodetic Office</a><br />
Added: 22 May 2011<br />
Updated: 15 Mar 2024<br />
Antarctic Geodetic Markstag:data.linz.govt.nz,2011-05:layers:507892011-05-22T06:05:14.346376+00:002024-03-15T13:36:36.611501+00:00
<a class="kxThumbnail" href="https://data.linz.govt.nz/layer/50789-antarctic-geodetic-marks/" title="Details for Antarctic Geodetic Marks"><img src="//tiles-cdn.koordinates.com/services/tiles/v4/thumbnail/layer=50789.399953,style=auto/90x70.png" alt="Antarctic Geodetic Marks thumbnail"/></a><br />
<br /><strong>Updated with new data on 15 Mar 2024</strong><br />
<p>This dataset provides information about the position, position accuracy, mark name, mark type, condition and unique four letter code for geodetic marks in terms of New Zealand's official geodetic datum for the Ross Dependency. </p>
<p>This dataset only includes marks that are within Antarctica. These positions have been generated using geodetic observations such as precise differential GPS or electronic distance and theodolite angles measurements. The positions are either 2D or 3D depending of the availability of this measurement data. </p>
<p>The source data is from Land Information New Zealand's (LINZ) Landonline system where it is used by Land Surveyors. This dataset is updated daily to reflect changes made in the Landonline.</p>
<h4>Accuracy</h4>
<p>Geodetic marks with a coordinate order of 5 or less have been positioned in terms of Ross Sea Region Geodetic Datum 2000 (RSRGD2000) using precise differential GPS techniques. Marks with order 6 have been positioned in terms of RSRGD2000 using precise horizontal angles and distance measurements. Lower order marks (order 7 and greater) are derived from lower accuracy measurement techniques or historical datum transformations, and may be significantly less accurate. </p>
<p>The accuracy of RSRGD2000 coordinates is described by a series of 'orders' classifications. Positions in terms of RSRGD2000 are described by three-dimensional coordinates (latitude, longitude, ellipsoidal height). The accuracy of a survey mark is indicated by its order. Orders are classifications based on the quality of the coordinate in relation to the datum and in relation to other surrounding marks. For more information see <a href="http://www.linz.govt.nz/geodetic/datums-projections-heights/heights/coordinate-orders/">www.linz.govt.nz/geodetic/datums-projections-heigh...</a></p>
<p>Note that the accuracy applies at the time the mark was last surveyed. Refer to the web geodetic database for historical information about mark coordinates. </p>
<p>Note also that the existence of a mark in this dataset does not imply that there is currently a physical mark in the ground - the dataset includes destroyed or lost historical marks. The geodetic database provides more information on the mark status, valid at last time it was visited by LINZ.</p>
From: <a href="https://data.linz.govt.nz/group/ngo/" title="Profile for National Geodetic Office">National Geodetic Office</a><br />
Added: 22 May 2011<br />
Updated: 15 Mar 2024<br />
Antarctic Geodetic Vertical Markstag:data.linz.govt.nz,2011-05:layers:507882011-05-22T06:04:48.246419+00:002024-03-15T13:36:34.401164+00:00
<a class="kxThumbnail" href="https://data.linz.govt.nz/layer/50788-antarctic-geodetic-vertical-marks/" title="Details for Antarctic Geodetic Vertical Marks"><img src="//tiles-cdn.koordinates.com/services/tiles/v4/thumbnail/layer=50788.399952,style=auto/90x70.png" alt="Antarctic Geodetic Vertical Marks thumbnail"/></a><br />
<br /><strong>Updated with new data on 15 Mar 2024</strong><br />
<p>This dataset provides information about the position, height, height datum, height accuracy, mark name, mark type, condition and unique four letter identifier for geodetic marks that have an authoritative height in terms of a vertical datum.<br>
Heights are in datums defined at <a href="http://www.linz.govt.nz/geodetic/datums-projections-heights/vertical-datums/">www.linz.govt.nz/geodetic/datums-projections-heigh...</a>.</p>
<p>All marks will have positions in terms of New Zealand’s official geodetic datum for Antarctica, Ross Sea Region Geodetic Datum 2000 (RSRGD2000). The horizontal positions of marks are provided for approximate location purposes only. </p>
<p>This dataset only includes marks that are within the Antarctic region. The height data for these marks have been generated primarily using precise vertical angle and slope distance measurements from datum tide gauges. Some have been generated from levelling data. </p>
<p>The source data is from Land Information New Zealand's (LINZ) Landonline system where it is used by Land Surveyors. This dataset is updated daily to reflect changes made in the Landonline.</p>
<h4>Accuracy</h4>
<p>The accuracy of normal-orthometric heights are described by height orders. </p>
<p>For more information see <a href="http://www.linz.govt.nz/geodetic/datums-projections-heights/heights/height-orders/">www.linz.govt.nz/geodetic/datums-projections-heigh...</a>. </p>
<p>Note the accuracy applies at the time the mark was last surveyed - see the geodetic database for historical information about height coordinates.</p>
From: <a href="https://data.linz.govt.nz/group/ngo/" title="Profile for National Geodetic Office">National Geodetic Office</a><br />
Added: 22 May 2011<br />
Updated: 15 Mar 2024<br />
Stewart Island 1977 to NZVD2016 Conversion Rastertag:data.linz.govt.nz,2019-10:layers:1039452019-10-03T06:26:50.822208+00:002019-10-03T04:10:56.673779+00:00
<a class="kxThumbnail" href="https://data.linz.govt.nz/layer/103945-stewart-island-1977-to-nzvd2016-conversion-raster/" title="Details for Stewart Island 1977 to NZVD2016 Conversion Raster"><img src="//tiles-cdn.koordinates.com/services/tiles/v4/thumbnail/layer=103945.324918,style=auto/90x70.png" alt="Stewart Island 1977 to NZVD2016 Conversion Raster thumbnail"/></a><br />
<br /><strong>Updated with new data on 03 Oct 2019</strong><br />
<p><strong>Warning:</strong> This raster is a grid of a floating-point values; not a surface. To derive an accurate height transformation value, this raster grid must be downloaded in terms of NZGD2000 and then converted into a surface using bilinear interpolation. </p>
<hr>
<p>The Stewart Island 1977 to NZVD2016 Conversion Raster provides users with a two arc-minute (approximately 3.6 kilometres) raster image of the conversion of normal-orthometric heights from the Stewart Island 1977 local vertical datum to the New Zealand Vertical Datum 2016 (NZVD2016).</p>
<p>The conversion value is represented by the attribute “O”, in metres.<br>
This conversion and NZVD2016 are formally defined in the LINZ standard <a href="http://www.linz.govt.nz/regulatory/25009">LINZS25009</a>.</p>
<p>The height conversion grid models the difference between the Stewart Island 1977 vertical datum and NZVD2016 using the LINZ GPS-levelling marks. From the GPS-levelling marks the expected accuracy is better than 2 centimetres (95% Confidence interval).</p>
<p>More information on converting heights between vertical datums can be found <a href="http://www.linz.govt.nz/data/geodetic-services/coordinate-conversion/converting-between-nzvd2016-nzgd2000-and-local-vertical-datums">on the LINZ website</a>.</p>
From: <a href="https://data.linz.govt.nz/group/ngo/" title="Profile for National Geodetic Office">National Geodetic Office</a><br />
Added: 03 Oct 2019<br />
Updated: 03 Oct 2019<br />
Gisborne 1926 to NZVD2016 Conversion Rastertag:data.linz.govt.nz,2019-10:layers:1039572019-10-07T18:44:21.274108+00:002019-10-07T18:41:14.398827+00:00
<a class="kxThumbnail" href="https://data.linz.govt.nz/layer/103957-gisborne-1926-to-nzvd2016-conversion-raster/" title="Details for Gisborne 1926 to NZVD2016 Conversion Raster"><img src="//tiles-cdn.koordinates.com/services/tiles/v4/thumbnail/layer=103957.325359,style=auto/90x70.png" alt="Gisborne 1926 to NZVD2016 Conversion Raster thumbnail"/></a><br />
<br /><strong>Updated with new data on 07 Oct 2019</strong><br />
<p><strong>Warning:</strong> This raster is a grid of a floating-point values; not a surface. To derive an accurate height transformation value, this raster grid must be downloaded in terms of NZGD2000 and then converted into a surface using bilinear interpolation. </p>
<hr>
<p>The Gisborne 1926 to NZVD2016 Conversion Raster provides users with a two arc-minute (approximately 3.6 kilometres) raster image of the conversion of normal-orthometric heights from the Gisborne 1926 local vertical datum to the New Zealand Vertical Datum 2016 (NZVD2016).</p>
<p>The conversion value is represented by the attribute “O”, in metres.<br>
This conversion and NZVD2016 are formally defined in the LINZ standard <a href="http://www.linz.govt.nz/regulatory/25009">LINZS25009</a>.</p>
<p>The height conversion grid models the difference between the Gisborne 1926 vertical datum and NZVD2016 using the LINZ GPS-levelling marks. From the GPS-levelling marks the expected accuracy is better than 2 centimetres (95% Confidence interval).</p>
<p>More information on converting heights between vertical datums can be found <a href="http://www.linz.govt.nz/data/geodetic-services/coordinate-conversion/converting-between-nzvd2016-nzgd2000-and-local-vertical-datums">on the LINZ website</a>.</p>
From: <a href="https://data.linz.govt.nz/group/ngo/" title="Profile for National Geodetic Office">National Geodetic Office</a><br />
Added: 07 Oct 2019<br />
Updated: 07 Oct 2019<br />
Taranaki 1970 to NZVD2016 Conversion Rastertag:data.linz.govt.nz,2019-10:layers:1039632019-10-07T18:44:50.941365+00:002019-10-07T18:41:18.407572+00:00
<a class="kxThumbnail" href="https://data.linz.govt.nz/layer/103963-taranaki-1970-to-nzvd2016-conversion-raster/" title="Details for Taranaki 1970 to NZVD2016 Conversion Raster"><img src="//tiles-cdn.koordinates.com/services/tiles/v4/thumbnail/layer=103963.325365,style=auto/90x70.png" alt="Taranaki 1970 to NZVD2016 Conversion Raster thumbnail"/></a><br />
<br /><strong>Updated with new data on 07 Oct 2019</strong><br />
<p><strong>Warning:</strong> This raster is a grid of a floating-point values; not a surface. To derive an accurate height transformation value, this raster grid must be downloaded in terms of NZGD2000 and then converted into a surface using bilinear interpolation. </p>
<hr>
<p>The Taranaki 1970 to NZVD2016 Conversion Raster provides users with a two arc-minute (approximately 3.6 kilometres) raster image of the conversion of normal-orthometric heights from the Taranaki 1970 local vertical datum to the New Zealand Vertical Datum 2016 (NZVD2016).</p>
<p>The conversion value is represented by the attribute “O”, in metres.<br>
This conversion and NZVD2016 are formally defined in the LINZ standard <a href="http://www.linz.govt.nz/regulatory/25009">LINZS25009</a>.</p>
<p>The height conversion grid models the difference between the Taranaki 1970 vertical datum and NZVD2016 using the LINZ GPS-levelling marks. From the GPS-levelling marks the expected accuracy is better than 2 centimetres (95% Confidence interval).</p>
<p>More information on converting heights between vertical datums can be found <a href="http://www.linz.govt.nz/data/geodetic-services/coordinate-conversion/converting-between-nzvd2016-nzgd2000-and-local-vertical-datums">on the LINZ website</a>.</p>
From: <a href="https://data.linz.govt.nz/group/ngo/" title="Profile for National Geodetic Office">National Geodetic Office</a><br />
Added: 07 Oct 2019<br />
Updated: 07 Oct 2019<br />
NZ Geoid 2009tag:data.linz.govt.nz,2011-10:layers:510512011-10-18T04:26:17.917938+00:002014-05-06T07:09:06.210048+00:00
<a class="kxThumbnail" href="https://data.linz.govt.nz/layer/51051-nz-geoid-2009/" title="Details for NZ Geoid 2009"><img src="//tiles-cdn.koordinates.com/services/tiles/v4/thumbnail/layer=51051.135986,style=auto/90x70.png" alt="NZ Geoid 2009 thumbnail"/></a><br />
<br /><strong>Updated with new data on 06 May 2014</strong><br />
<p><strong>Warning:</strong> This raster is a grid of a floating-point values; not a surface. To derive an accurate height transformation value, this raster grid must be downloaded in terms of NZGD2000 and then converted into a surface using bilinear interpolation. </p>
<hr>
<p>The New Zealand Quasigeoid2009 (NZGeoid2009) can be used to convert GPS derived ellipsoidal heights to New Zealand Vertical Datum 2009 (NZVD2009) normal-orthometric heights that relate more closely to mean sea level and the local gravity field. NZGeoid2009 can also be used to transform heights to any of the 13 official local vertical datums used across New Zealand, more information on this transformation is available at <a href="http://www.linz.govt.nz/geodetic/conversion-coordinates/height-conversions">www.linz.govt.nz/geodetic/conversion-coordinates/h...</a>.</p>
<p>NZGeoid2009 is formally defined in the LINZ standard LINZS25004 which can be obtained from <a href="http://www.linz.govt.nz/geodetic/standards-publications/standards">www.linz.govt.nz/geodetic/standards-publications/s...</a>. NZGeoid2009 models the difference between the GRS80 ellipsoid and the geoid over the New Zealand region. The geoid is a theoretical surface of equal gravity that roughly approximates the mean level of the sea across the Earth.</p>
<p>NZGeoid2009 is published by LINZ and was computed by enhancing the EGM2008 global gravity model with terrestrial gravity observations over New Zealand and DNSC08 satellite altimetry data over the oceans. The model is published on a one arc-minute grid covering New Zealand's extended exclusive economic zone.</p>
<p>The accuracy of NZGeoid2009 is nominally ±0.08 metres across New Zealand. More information on the accuracy in relation to the 13 local vertical datums is provided in LINZS25004.</p>
From: <a href="https://data.linz.govt.nz/group/ngo/" title="Profile for National Geodetic Office">National Geodetic Office</a><br />
Added: 18 Oct 2011<br />
Updated: 06 May 2014<br />
NZ Airborne Gravity Free-Air Anomalies at Ground Surface (2013-2014)tag:data.linz.govt.nz,2016-12:layers:535322016-12-09T00:12:37.161798+00:002017-01-30T20:25:10.197743+00:00
<a class="kxThumbnail" href="https://data.linz.govt.nz/layer/53532-nz-airborne-gravity-free-air-anomalies-at-ground-surface-2013-2014/" title="Details for NZ Airborne Gravity Free-Air Anomalies at Ground Surface (2013-2014)"><img src="//tiles-cdn.koordinates.com/services/tiles/v4/thumbnail/layer=53532.162271,style=auto/90x70.png" alt="NZ Airborne Gravity Free-Air Anomalies at Ground Surface (2013-2014) thumbnail"/></a><br />
<br /><strong>Updated with new data on 30 Jan 2017</strong><br />
<p><strong>Warning:</strong> This raster is a grid of a floating-point values; not a surface. To derive an accurate height transformation value, this raster grid must be downloaded in terms of NZGD2000 and then converted into a surface using bilinear interpolation. </p>
<hr>
<p><strong>Introduction</strong><br>
This dataset provides a 1 arc minute raster image of the free-air gravity anomalies, which have been downward continued to the ground surface (McCubbine et al, 2017).</p>
<p><strong>Description</strong><br>
Gravity anomalies are differences between measured gravity (from the airborne gravity dataset) and an ellipsoidal model of the Earth’s gravity field (GRS80). Gravity anomalies correspond to un-modelled density variations within the Earth’s crust and upper mantle. They are used to investigate concealed geological structures and for quasigeoid modelling.</p>
<p>These free-air anomalies show values which include gravitation impact of the topography.</p>
<p>The national airborne gravity dataset is comprised of more than 50,000 linear km of flight observations, covering the three main islands of New Zealand and up to 10km offshore.</p>
<p>As the airborne gravity dataset was measured at flight altitude, the observations have been reduced to the ground surface (a process known as downward continuation).</p>
<p>The national airborne gravity dataset was collected as a joint project between Toitū Te Whenua Land Information New Zealand (LINZ), GNS Science (GNS) and Victoria University of Wellington (VUW). The airborne survey was completed in a total of eight months, over two campaigns: August – October 2013, and February – June 2014.</p>
<p><strong>Users may also be interested other layers created for Bouguer anomalies at ground surface and the along track observations from the gravity flight lines at flight elevation</strong> <a href="https://data.linz.govt.nz/layer/3530">NZ Airborne Gravity Bouguer Anomalies at Ground Surface (2013-2014)</a> and <a href="https://data.linz.govt.nz/layer/3531">NZ Airborne Gravity Flight Lines at Elevation (2013-2014)</a>.</p>
<p>McCubbine, J. Stagpoole, V. Caratori-Tontini, F. Amos, M. Smith, E. and Winefield, R. (2017). Gravity anomaly grids for the New Zealand region. Manuscript submitted for publication New Zealand Journal of Geology and Geophysics.</p>
From: <a href="https://data.linz.govt.nz/group/ngo/" title="Profile for National Geodetic Office">National Geodetic Office</a><br />
Added: 09 Dec 2016<br />
Updated: 30 Jan 2017<br />
Dunedin-Bluff 1960 to NZVD2016 Conversion Rastertag:data.linz.govt.nz,2019-10:layers:1039562019-10-07T18:44:16.723704+00:002019-10-07T18:41:13.753356+00:00
<a class="kxThumbnail" href="https://data.linz.govt.nz/layer/103956-dunedin-bluff-1960-to-nzvd2016-conversion-raster/" title="Details for Dunedin-Bluff 1960 to NZVD2016 Conversion Raster"><img src="//tiles-cdn.koordinates.com/services/tiles/v4/thumbnail/layer=103956.325358,style=auto/90x70.png" alt="Dunedin-Bluff 1960 to NZVD2016 Conversion Raster thumbnail"/></a><br />
<br /><strong>Updated with new data on 07 Oct 2019</strong><br />
<p><strong>Warning:</strong> This raster is a grid of a floating-point values; not a surface. To derive an accurate height transformation value, this raster grid must be downloaded in terms of NZGD2000 and then converted into a surface using bilinear interpolation. </p>
<hr>
<p>The Dunedin-Bluff 1960 to NZVD2016 Conversion Raster provides users with a two arc-minute (approximately 3.6 kilometres) raster image of the conversion of normal-orthometric heights from the Dunedin-Bluff 1960 local vertical datum to the New Zealand Vertical Datum 2016 (NZVD2016).</p>
<p>The conversion value is represented by the attribute “O”, in metres.<br>
This conversion and NZVD2016 are formally defined in the LINZ standard <a href="http://www.linz.govt.nz/regulatory/25009">LINZS25009</a>.</p>
<p>The height conversion grid models the difference between the Dunedin-Bluff 1960 vertical datum and NZVD2016 using the LINZ GPS-levelling marks. From the GPS-levelling marks the expected accuracy is better than 2 centimetres (95% Confidence interval).</p>
<p>More information on converting heights between vertical datums can be found <a href="http://www.linz.govt.nz/data/geodetic-services/coordinate-conversion/converting-between-nzvd2016-nzgd2000-and-local-vertical-datums">on the LINZ website</a>.</p>
From: <a href="https://data.linz.govt.nz/group/ngo/" title="Profile for National Geodetic Office">National Geodetic Office</a><br />
Added: 07 Oct 2019<br />
Updated: 07 Oct 2019<br />
NZ Airborne Gravity Bouguer Anomalies at Ground Surface (2013-2014)tag:data.linz.govt.nz,2016-12:layers:535302016-12-08T20:35:54.652419+00:002017-01-30T20:24:06.956781+00:00
<a class="kxThumbnail" href="https://data.linz.govt.nz/layer/53530-nz-airborne-gravity-bouguer-anomalies-at-ground-surface-2013-2014/" title="Details for NZ Airborne Gravity Bouguer Anomalies at Ground Surface (2013-2014)"><img src="//tiles-cdn.koordinates.com/services/tiles/v4/thumbnail/layer=53530.162270,style=auto/90x70.png" alt="NZ Airborne Gravity Bouguer Anomalies at Ground Surface (2013-2014) thumbnail"/></a><br />
<br /><strong>Updated with new data on 30 Jan 2017</strong><br />
<p><strong>Warning:</strong> This raster is a grid of a floating-point values; not a surface. To derive an accurate height transformation value, this raster grid must be downloaded in terms of NZGD2000 and then converted into a surface using bilinear interpolation. </p>
<hr>
<p>The national airborne gravity dataset is comprised of more than 50,000 linear km of flight observations, covering the three main islands of New Zealand and up to 10km offshore.</p>
<p>This dataset provides a 1 arc minute raster image of the Bouguer anomalies, which have been downward continued to the ground surface (McCubbine et al, 2017).</p>
<p>The national airborne gravity dataset was collected as a joint project between Toitū Te Whenua Land Information New Zealand (LINZ), GNS Science (GNS) and Victoria University of Wellington (VUW). The airborne survey was completed in a total of eight months, over two campaigns: August – October 2013, and February – June 2014.</p>
<p><strong>Users may also be interested in other layers created for the free-air anomalies at ground surface and the along track observations from the gravity flight lines at flight elevation</strong> <a href="https://data.linz.govt.nz/layer/3532">NZ Airborne Gravity Free-Air Anomalies at Ground Surface (2013-2014)</a> and <a href="https://data.linz.govt.nz/layer/3531">NZ Airborne Gravity Flight Lines at Elevation (2013-2014)</a>.</p>
<p>McCubbine, J. Stagpoole, V. Caratori-Tontini, F. Amos, M. Smith, E. and Winefield, R. (2017). Gravity anomaly grids for the New Zealand region. Manuscript submitted for publication New ZealandJournal of Geology and Geophysics.</p>
From: <a href="https://data.linz.govt.nz/group/ngo/" title="Profile for National Geodetic Office">National Geodetic Office</a><br />
Added: 08 Dec 2016<br />
Updated: 30 Jan 2017<br />
One Tree Point 1964 to NZVD2016 Conversion Rastertag:data.linz.govt.nz,2019-10:layers:1039622019-10-07T18:44:53.040129+00:002019-10-07T18:41:17.488853+00:00
<a class="kxThumbnail" href="https://data.linz.govt.nz/layer/103962-one-tree-point-1964-to-nzvd2016-conversion-raster/" title="Details for One Tree Point 1964 to NZVD2016 Conversion Raster"><img src="//tiles-cdn.koordinates.com/services/tiles/v4/thumbnail/layer=103962.325364,style=auto/90x70.png" alt="One Tree Point 1964 to NZVD2016 Conversion Raster thumbnail"/></a><br />
<br /><strong>Updated with new data on 07 Oct 2019</strong><br />
<p><strong>Warning:</strong> This raster is a grid of a floating-point values; not a surface. To derive an accurate height transformation value, this raster grid must be downloaded in terms of NZGD2000 and then converted into a surface using bilinear interpolation. </p>
<hr>
<p>The One Tree Point 1964 to NZVD2016 Conversion Raster provides users with a two arc-minute (approximately 3.6 kilometres) raster image of the conversion of normal-orthometric heights from the One Tree Point 1964 local vertical datum to the New Zealand Vertical Datum 2016 (NZVD2016).</p>
<p>The conversion value is represented by the attribute “O”, in metres.<br>
This conversion and NZVD2016 are formally defined in the LINZ standard <a href="http://www.linz.govt.nz/regulatory/25009">LINZS25009</a>.</p>
<p>The height conversion grid models the difference between the One Tree Point 1964 vertical datum and NZVD2016 using the LINZ GPS-levelling marks. From the GPS-levelling marks the expected accuracy is better than 2 centimetres (95% Confidence interval).</p>
<p>More information on converting heights between vertical datums can be found <a href="http://www.linz.govt.nz/data/geodetic-services/coordinate-conversion/converting-between-nzvd2016-nzgd2000-and-local-vertical-datums">on the LINZ website</a>.</p>
From: <a href="https://data.linz.govt.nz/group/ngo/" title="Profile for National Geodetic Office">National Geodetic Office</a><br />
Added: 07 Oct 2019<br />
Updated: 07 Oct 2019<br />
Napier 1962 to NZVD2016 Conversion Rastertag:data.linz.govt.nz,2019-10:layers:1039602019-10-07T18:44:42.528930+00:002019-10-07T18:41:16.160586+00:00
<a class="kxThumbnail" href="https://data.linz.govt.nz/layer/103960-napier-1962-to-nzvd2016-conversion-raster/" title="Details for Napier 1962 to NZVD2016 Conversion Raster"><img src="//tiles-cdn.koordinates.com/services/tiles/v4/thumbnail/layer=103960.325362,style=auto/90x70.png" alt="Napier 1962 to NZVD2016 Conversion Raster thumbnail"/></a><br />
<br /><strong>Updated with new data on 07 Oct 2019</strong><br />
<p><strong>Warning:</strong> This raster is a grid of a floating-point values; not a surface. To derive an accurate height transformation value, this raster grid must be downloaded in terms of NZGD2000 and then converted into a surface using bilinear interpolation. </p>
<hr>
<p>The Napier 1962 to NZVD2016 Conversion Raster provides users with a two arc-minute (approximately 3.6 kilometres) raster image of the conversion of normal-orthometric heights from the Napier 1962 local vertical datum to the New Zealand Vertical Datum 2016 (NZVD2016).</p>
<p>The conversion value is represented by the attribute “O”, in metres.<br>
This conversion and NZVD2016 are formally defined in the LINZ standard <a href="http://www.linz.govt.nz/regulatory/25009">LINZS25009</a>.</p>
<p>The height conversion grid models the difference between the Napier 1962 vertical datum and NZVD2016 using the LINZ GPS-levelling marks. From the GPS-levelling marks the expected accuracy is better than 2 centimetres (95% Confidence interval).</p>
<p>More information on converting heights between vertical datums can be found <a href="http://www.linz.govt.nz/data/geodetic-services/coordinate-conversion/converting-between-nzvd2016-nzgd2000-and-local-vertical-datums">on the LINZ website</a>.</p>
From: <a href="https://data.linz.govt.nz/group/ngo/" title="Profile for National Geodetic Office">National Geodetic Office</a><br />
Added: 07 Oct 2019<br />
Updated: 07 Oct 2019<br />
Moturiki 1953 to NZVD2016 Conversion Rastertag:data.linz.govt.nz,2019-10:layers:1039592019-10-07T18:44:42.926703+00:002019-10-07T18:41:15.592974+00:00
<a class="kxThumbnail" href="https://data.linz.govt.nz/layer/103959-moturiki-1953-to-nzvd2016-conversion-raster/" title="Details for Moturiki 1953 to NZVD2016 Conversion Raster"><img src="//tiles-cdn.koordinates.com/services/tiles/v4/thumbnail/layer=103959.325361,style=auto/90x70.png" alt="Moturiki 1953 to NZVD2016 Conversion Raster thumbnail"/></a><br />
<br /><strong>Updated with new data on 07 Oct 2019</strong><br />
<p><strong>Warning:</strong> This raster is a grid of a floating-point values; not a surface. To derive an accurate height transformation value, this raster grid must be downloaded in terms of NZGD2000 and then converted into a surface using bilinear interpolation. </p>
<hr>
<p>The Moturiki 1953 to NZVD2016 Conversion Raster provides users with a two arc-minute (approximately 3.6 kilometres) raster image of the conversion of normal-orthometric heights from the Moturiki 1953 local vertical datum to the New Zealand Vertical Datum 2016 (NZVD2016).</p>
<p>The conversion value is represented by the attribute “O”, in metres.<br>
This conversion and NZVD2016 are formally defined in the LINZ standard <a href="http://www.linz.govt.nz/regulatory/25009">LINZS25009</a>.</p>
<p>The height conversion grid models the difference between the Moturiki 1953 vertical datum and NZVD2016 using the LINZ GPS-levelling marks. From the GPS-levelling marks the expected accuracy is better than 2 centimetres (95% Confidence interval).</p>
<p>More information on converting heights between vertical datums can be found <a href="http://www.linz.govt.nz/data/geodetic-services/coordinate-conversion/converting-between-nzvd2016-nzgd2000-and-local-vertical-datums">on the LINZ website</a>.</p>
From: <a href="https://data.linz.govt.nz/group/ngo/" title="Profile for National Geodetic Office">National Geodetic Office</a><br />
Added: 07 Oct 2019<br />
Updated: 07 Oct 2019<br />
Nelson 1955 to NZVD2016 Conversion Rastertag:data.linz.govt.nz,2019-10:layers:1039612019-10-07T18:44:51.338931+00:002019-10-07T18:41:16.500390+00:00
<a class="kxThumbnail" href="https://data.linz.govt.nz/layer/103961-nelson-1955-to-nzvd2016-conversion-raster/" title="Details for Nelson 1955 to NZVD2016 Conversion Raster"><img src="//tiles-cdn.koordinates.com/services/tiles/v4/thumbnail/layer=103961.325363,style=auto/90x70.png" alt="Nelson 1955 to NZVD2016 Conversion Raster thumbnail"/></a><br />
<br /><strong>Updated with new data on 07 Oct 2019</strong><br />
<p><strong>Warning:</strong> This raster is a grid of a floating-point values; not a surface. To derive an accurate height transformation value, this raster grid must be downloaded in terms of NZGD2000 and then converted into a surface using bilinear interpolation. </p>
<hr>
<p>The Nelson 1955 to NZVD2016 Conversion Raster provides users with a two arc-minute (approximately 3.6 kilometres) raster image of the conversion of normal-orthometric heights from the Nelson 1955 local vertical datum to the New Zealand Vertical Datum 2016 (NZVD2016).</p>
<p>The conversion value is represented by the attribute “O”, in metres.<br>
This conversion and NZVD2016 are formally defined in the LINZ standard <a href="http://www.linz.govt.nz/regulatory/25009">LINZS25009</a>.</p>
<p>The height conversion grid models the difference between the Nelson 1955 vertical datum and NZVD2016 using the LINZ GPS-levelling marks. From the GPS-levelling marks the expected accuracy is better than 2 centimetres (95% Confidence interval).</p>
<p>More information on converting heights between vertical datums can be found <a href="http://www.linz.govt.nz/data/geodetic-services/coordinate-conversion/converting-between-nzvd2016-nzgd2000-and-local-vertical-datums">on the LINZ website</a>.</p>
From: <a href="https://data.linz.govt.nz/group/ngo/" title="Profile for National Geodetic Office">National Geodetic Office</a><br />
Added: 07 Oct 2019<br />
Updated: 07 Oct 2019<br />
Dunedin 1958 to NZVD2016 Conversion Rastertag:data.linz.govt.nz,2019-10:layers:1039552019-10-07T18:44:38.604351+00:002019-10-07T18:41:12.697973+00:00
<a class="kxThumbnail" href="https://data.linz.govt.nz/layer/103955-dunedin-1958-to-nzvd2016-conversion-raster/" title="Details for Dunedin 1958 to NZVD2016 Conversion Raster"><img src="//tiles-cdn.koordinates.com/services/tiles/v4/thumbnail/layer=103955.325357,style=auto/90x70.png" alt="Dunedin 1958 to NZVD2016 Conversion Raster thumbnail"/></a><br />
<br /><strong>Updated with new data on 07 Oct 2019</strong><br />
<p><strong>Warning:</strong> This raster is a grid of a floating-point values; not a surface. To derive an accurate height transformation value, this raster grid must be downloaded in terms of NZGD2000 and then converted into a surface using bilinear interpolation. </p>
<hr>
<p>The Dunedin 1958 to NZVD2016 Conversion Raster provides users with a two arc-minute (approximately 3.6 kilometres) raster image of the conversion of normal-orthometric heights from the Dunedin 1958 local vertical datum to the New Zealand Vertical Datum 2016 (NZVD2016).</p>
<p>The conversion value is represented by the attribute “O”, in metres.<br>
This conversion and NZVD2016 are formally defined in the LINZ standard <a href="http://www.linz.govt.nz/regulatory/25009">LINZS25009</a>.</p>
<p>The height conversion grid models the difference between the Dunedin 1958 vertical datum and NZVD2016 using the LINZ GPS-levelling marks. From the GPS-levelling marks the expected accuracy is better than 2 centimetres (95% Confidence interval).</p>
<p>More information on converting heights between vertical datums can be found <a href="http://www.linz.govt.nz/data/geodetic-services/coordinate-conversion/converting-between-nzvd2016-nzgd2000-and-local-vertical-datums">on the LINZ website</a>.</p>
From: <a href="https://data.linz.govt.nz/group/ngo/" title="Profile for National Geodetic Office">National Geodetic Office</a><br />
Added: 07 Oct 2019<br />
Updated: 07 Oct 2019<br />
Bluff 1955 to NZVD2016 Conversion Rastertag:data.linz.govt.nz,2019-10:layers:1039542019-10-07T18:43:40.656716+00:002019-10-07T18:40:57.213449+00:00
<a class="kxThumbnail" href="https://data.linz.govt.nz/layer/103954-bluff-1955-to-nzvd2016-conversion-raster/" title="Details for Bluff 1955 to NZVD2016 Conversion Raster"><img src="//tiles-cdn.koordinates.com/services/tiles/v4/thumbnail/layer=103954.325356,style=auto/90x70.png" alt="Bluff 1955 to NZVD2016 Conversion Raster thumbnail"/></a><br />
<br /><strong>Updated with new data on 07 Oct 2019</strong><br />
<p><strong>Warning:</strong> This raster is a grid of a floating-point values; not a surface. To derive an accurate height transformation value, this raster grid must be downloaded in terms of NZGD2000 and then converted into a surface using bilinear interpolation. </p>
<hr>
<p>The Bluff 1955 to NZVD2016 Conversion Raster provides users with a two arc-minute (approximately 3.6 kilometres) raster image of the conversion of normal-orthometric heights from the Bluff 1955 local vertical datum to the New Zealand Vertical Datum 2016 (NZVD2016).</p>
<p>The conversion value is represented by the attribute “O”, in metres.<br>
This conversion and NZVD2016 are formally defined in the LINZ standard <a href="http://www.linz.govt.nz/regulatory/25009">LINZS25009</a>.</p>
<p>The height conversion grid models the difference between the Bluff 1955 vertical datum and NZVD2016 using the LINZ GPS-levelling marks. From the GPS-levelling marks the expected accuracy is better than 2 centimetres (95% Confidence interval).</p>
<p>More information on converting heights between vertical datums can be found <a href="http://www.linz.govt.nz/data/geodetic-services/coordinate-conversion/converting-between-nzvd2016-nzgd2000-and-local-vertical-datums">on the LINZ website</a>.</p>
From: <a href="https://data.linz.govt.nz/group/ngo/" title="Profile for National Geodetic Office">National Geodetic Office</a><br />
Added: 07 Oct 2019<br />
Updated: 07 Oct 2019<br />
Wellington 1953 to NZVD2016 Conversion Rastertag:data.linz.govt.nz,2019-10:layers:1039642019-10-07T18:44:56.627876+00:002019-10-07T18:41:19.203007+00:00
<a class="kxThumbnail" href="https://data.linz.govt.nz/layer/103964-wellington-1953-to-nzvd2016-conversion-raster/" title="Details for Wellington 1953 to NZVD2016 Conversion Raster"><img src="//tiles-cdn.koordinates.com/services/tiles/v4/thumbnail/layer=103964.325366,style=auto/90x70.png" alt="Wellington 1953 to NZVD2016 Conversion Raster thumbnail"/></a><br />
<br /><strong>Updated with new data on 07 Oct 2019</strong><br />
<p><strong>Warning:</strong> This raster is a grid of a floating-point values; not a surface. To derive an accurate height transformation value, this raster grid must be downloaded in terms of NZGD2000 and then converted into a surface using bilinear interpolation. </p>
<hr>
<p>The Wellington 1953 to NZVD2016 Conversion Raster provides users with a two arc-minute (approximately 3.6 kilometres) raster image of the conversion of normal-orthometric heights from the Wellington 1953 local vertical datum to the New Zealand Vertical Datum 2016 (NZVD2016).</p>
<p>The conversion value is represented by the attribute “O”, in metres.<br>
This conversion and NZVD2016 are formally defined in the LINZ standard <a href="http://www.linz.govt.nz/regulatory/25009">LINZS25009</a>.</p>
<p>The height conversion grid models the difference between the Wellington 1953 vertical datum and NZVD2016 using the LINZ GPS-levelling marks. From the GPS-levelling marks the expected accuracy is better than 2 centimetres (95% Confidence interval).</p>
<p>More information on converting heights between vertical datums can be found <a href="http://www.linz.govt.nz/data/geodetic-services/coordinate-conversion/converting-between-nzvd2016-nzgd2000-and-local-vertical-datums">on the LINZ website</a>.</p>
From: <a href="https://data.linz.govt.nz/group/ngo/" title="Profile for National Geodetic Office">National Geodetic Office</a><br />
Added: 07 Oct 2019<br />
Updated: 07 Oct 2019<br />
Lyttelton 1937 to NZVD2016 Conversion Rastertag:data.linz.govt.nz,2019-10:layers:1039582019-10-07T18:44:20.725195+00:002019-10-07T18:41:14.905725+00:00
<a class="kxThumbnail" href="https://data.linz.govt.nz/layer/103958-lyttelton-1937-to-nzvd2016-conversion-raster/" title="Details for Lyttelton 1937 to NZVD2016 Conversion Raster"><img src="//tiles-cdn.koordinates.com/services/tiles/v4/thumbnail/layer=103958.325360,style=auto/90x70.png" alt="Lyttelton 1937 to NZVD2016 Conversion Raster thumbnail"/></a><br />
<br /><strong>Updated with new data on 07 Oct 2019</strong><br />
<p><strong>Warning:</strong> This raster is a grid of a floating-point values; not a surface. To derive an accurate height transformation value, this raster grid must be downloaded in terms of NZGD2000 and then converted into a surface using bilinear interpolation. </p>
<hr>
<p>The Lyttelton 1937 to NZVD2016 Conversion Raster provides users with a two arc-minute (approximately 3.6 kilometres) raster image of the conversion of normal-orthometric heights from the Lyttelton 1937 local vertical datum to the New Zealand Vertical Datum 2016 (NZVD2016).</p>
<p>The conversion value is represented by the attribute “O”, in metres.<br>
This conversion and NZVD2016 are formally defined in the LINZ standard <a href="http://www.linz.govt.nz/regulatory/25009">LINZS25009</a>.</p>
<p>The height conversion grid models the difference between the Lyttelton 1937 vertical datum and NZVD2016 using the LINZ GPS-levelling marks. From the GPS-levelling marks the expected accuracy is better than 2 centimetres (95% Confidence interval).</p>
<p>More information on converting heights between vertical datums can be found <a href="http://www.linz.govt.nz/data/geodetic-services/coordinate-conversion/converting-between-nzvd2016-nzgd2000-and-local-vertical-datums">on the LINZ website</a>.</p>
From: <a href="https://data.linz.govt.nz/group/ngo/" title="Profile for National Geodetic Office">National Geodetic Office</a><br />
Added: 07 Oct 2019<br />
Updated: 07 Oct 2019<br />
Auckland 1946 to NZVD2016 Conversion Rastertag:data.linz.govt.nz,2019-10:layers:1039532019-10-07T02:22:43.021151+00:002019-10-07T02:20:20.459768+00:00
<a class="kxThumbnail" href="https://data.linz.govt.nz/layer/103953-auckland-1946-to-nzvd2016-conversion-raster/" title="Details for Auckland 1946 to NZVD2016 Conversion Raster"><img src="//tiles-cdn.koordinates.com/services/tiles/v4/thumbnail/layer=103953.325355,style=auto/90x70.png" alt="Auckland 1946 to NZVD2016 Conversion Raster thumbnail"/></a><br />
<br /><strong>Updated with new data on 07 Oct 2019</strong><br />
<p><strong>Warning:</strong> This raster is a grid of a floating-point values; not a surface. To derive an accurate height transformation value, this raster grid must be downloaded in terms of NZGD2000 and then converted into a surface using bilinear interpolation. </p>
<hr>
<p>The Auckland 1946 to NZVD2016 Conversion Raster provides users with a two arc-minute (approximately 3.6 kilometres) raster image of the conversion of normal-orthometric heights from the Auckland 1946 local vertical datum to the New Zealand Vertical Datum 2016 (NZVD2016).</p>
<p>The conversion value is represented by the attribute “O”, in metres.<br>
This conversion and NZVD2016 are formally defined in the LINZ standard <a href="http://www.linz.govt.nz/regulatory/25009">LINZS25009</a>.</p>
<p>The height conversion grid models the difference between the Auckland 1946 vertical datum and NZVD2016 using the LINZ GPS-levelling marks. From the GPS-levelling marks the expected accuracy is better than 2 centimetres (95% Confidence interval).</p>
<p>More information on converting heights between vertical datums can be found <a href="http://www.linz.govt.nz/data/geodetic-services/coordinate-conversion/converting-between-nzvd2016-nzgd2000-and-local-vertical-datums">on the LINZ website</a>.</p>
From: <a href="https://data.linz.govt.nz/group/ngo/" title="Profile for National Geodetic Office">National Geodetic Office</a><br />
Added: 07 Oct 2019<br />
Updated: 07 Oct 2019<br />
NZ Quasigeoid 2016 Rastertag:data.linz.govt.nz,2016-07:layers:534472016-07-25T21:26:09.295441+00:002016-07-25T21:22:47.008505+00:00
<a class="kxThumbnail" href="https://data.linz.govt.nz/layer/53447-nz-quasigeoid-2016-raster/" title="Details for NZ Quasigeoid 2016 Raster"><img src="//tiles-cdn.koordinates.com/services/tiles/v4/thumbnail/layer=53447.156402,style=auto/90x70.png" alt="NZ Quasigeoid 2016 Raster thumbnail"/></a><br />
<br /><strong>Updated with new data on 25 Jul 2016</strong><br />
<p><strong>Warning:</strong> This raster is a grid of a floating-point values; not a surface. To derive an accurate height transformation value, this raster grid must be downloaded in terms of NZGD2000 and then converted into a surface using bilinear interpolation. </p>
<hr>
<p>New Zealand Quasigeoid 2016 Raster, provides users with a one arc-minute gridded (approximately 1.8 kilometres) raster image of the New Zealand Quasigeoid 2016 (NZGeoid2016).</p>
<p>The relationship between the GRS80 ellipsoid and the New Zealand Vertical Datum 2016 (NZVD2016) is modelled by [NZGeoid2016] and is represented by the attribute “N”, in metres.(<a href="http://data.linz.govt.nz/layer/3418">data.linz.govt.nz/layer/3418</a>).<br>
NZVD2016 is formally defined in the LINZ standard <a href="http://www.linz.govt.nz/regulatory/25009">LINZS25009</a>.</p>
<p><strong>Users may also be interested in transforming heights to any of the 13 historic local vertical datums used in New Zealand using the appropriate datum relationship grid displayed in the <a href="http://data.linz.govt.nz/layer/3419">NZ Height Conversion Index</a>.</strong></p>
<p>More information on these transformations is available <a href="http://www.linz.govt.nz/data/geodetic-services/coordinate-conversion/converting-between-nzvd2016-nzgd2000-and-local-vertical-datums">on the LINZ website</a>.</p>
From: <a href="https://data.linz.govt.nz/group/ngo/" title="Profile for National Geodetic Office">National Geodetic Office</a><br />
Added: 25 Jul 2016<br />
Updated: 25 Jul 2016<br />
NZ Meridional Circuit Boundaries (NZGD2000)tag:data.linz.govt.nz,2011-07:layers:508172011-07-04T22:35:16.452855+00:002011-07-05T21:31:16.750144+00:00
<a class="kxThumbnail" href="https://data.linz.govt.nz/layer/50817-nz-meridional-circuit-boundaries-nzgd2000/" title="Details for NZ Meridional Circuit Boundaries (NZGD2000)"><img src="//tiles-cdn.koordinates.com/services/tiles/v4/thumbnail/layer=50817.126817,style=auto/90x70.png" alt="NZ Meridional Circuit Boundaries (NZGD2000) thumbnail"/></a><br />
<br /><strong>Updated with new data on 05 Jul 2011</strong><br />
<p>The NZGD2000 Meridional Circuit Boundaries as defined by LINZ. <a href="http://www.linz.govt.nz/survey-titles/cadastral-surveying/publications/sg-rules/index.aspx">The Rules for Cadastral Survey</a> require surveyors to carry out surveys in terms of one of 28 Transverse Mercator meridional circuits.</p>
<p>The cos_id contained within this data is a reference to the Landonline coordinate system identifier For more information see crs_coordinate_system in the <a href="http://www.linz.govt.nz/survey-titles/landonline-data/landonline-bde/bde-documentation">Landonline BDE data dictionary documentation</a>. These polygons were digitised from an NZMS 266 map. </p>
<p>Original data sourced from <a href="http://www.linz.govt.nz/geodetic/datums-projections-heights/projections/nzgd2000-meridional-circuits/index.aspx">here</a></p>
From: <a href="https://data.linz.govt.nz/group/ngo/" title="Profile for National Geodetic Office">National Geodetic Office</a><br />
Added: 04 Jul 2011<br />
Updated: 05 Jul 2011<br />
Stewart Island 1977 to NZVD2016 Conversiontag:data.linz.govt.nz,2016-07:layers:534422016-07-25T21:03:33.123902+00:002016-08-03T19:32:53.816428+00:00
<a class="kxThumbnail" href="https://data.linz.govt.nz/layer/53442-stewart-island-1977-to-nzvd2016-conversion/" title="Details for Stewart Island 1977 to NZVD2016 Conversion"><img src="//tiles-cdn.koordinates.com/services/tiles/v4/thumbnail/layer=53442.156579,style=auto/90x70.png" alt="Stewart Island 1977 to NZVD2016 Conversion thumbnail"/></a><br />
<br /><strong>Updated with new data on 03 Aug 2016</strong><br />
<p>The STI77-NZVD2016 grid enables the conversion of normal-orthometric heights from the Stewart Island 1977 local vertical datum to the New Zealand Vertical Datum 2016 (NZVD2016). </p>
<p>The conversion value is represented by the attribute “O”, in metres. </p>
<p>This conversion and NZVD2016 are formally defined in the LINZ standard <a href="http://www.linz.govt.nz/regulatory/25009">LINZS25009</a>. </p>
<p>STI77-NZVD2016 is published on a two arc-minute grid (approximately 3.6 kilometres) extending over the benchmarks that nominally define the extent of the Stewart Island 1977 vertical datum (167.2° E to 168.8° E, 46.5° S to 47.5° S). </p>
<p>The height conversion grid models the difference between the Stewart Island 1977 vertical datum and NZVD2016 using the LINZ GPS-levelling marks. From the GPS-levelling marks the expected accuracy of STI77-NZVD2016 is better than 18 centimetres (95% Confidence interval). </p>
<p>More information on converting heights between vertical datums can be found <a href="http://www.linz.govt.nz/data/geodetic-services/coordinate-conversion/converting-between-nzvd2016-nzgd2000-and-local-vertical-datums">on the LINZ website</a>.</p>
From: <a href="https://data.linz.govt.nz/group/ngo/" title="Profile for National Geodetic Office">National Geodetic Office</a><br />
Added: 25 Jul 2016<br />
Updated: 03 Aug 2016<br />
Canterbury Earthquake Geodetic Marks (2010, 2011) - Comprehensivetag:data.linz.govt.nz,2013-04:layers:515882013-04-26T02:51:32.056077+00:002013-04-26T02:49:55.646545+00:00
<a class="kxThumbnail" href="https://data.linz.govt.nz/layer/51588-canterbury-earthquake-geodetic-marks-2010-2011-comprehensive/" title="Details for Canterbury Earthquake Geodetic Marks (2010, 2011) - Comprehensive"><img src="//tiles-cdn.koordinates.com/services/tiles/v4/thumbnail/layer=51588.131835,style=auto/90x70.png" alt="Canterbury Earthquake Geodetic Marks (2010, 2011) - Comprehensive thumbnail"/></a><br />
<br /><strong>Updated with new data on 26 Apr 2013</strong><br />
<p>The Canterbury region of New Zealand experienced a sequence of significant earthquakes during 2010 and 2011. These earthquakes occurred on 2010-09-04, 2011-02-22, 2011-06-13 and 2011-12-23. This layer contains coordinates computed from GNSS fast static and network RTK surveys undertaken after the Canterbury earthquakes. It also includes Lyttelton Vertical Datum 1937 and Christchurch Drainage Datum heights, derived from the GNSS data.</p>
<p><strong>Users may also be interested in the simplified data in the companion layer <a href="http://data.linz.govt.nz/layer/1589">Canterbury Earthquake Geodetic Marks (2010, 2011) - Simple</a>.</strong></p>
<p>These coordinates are only provisional. Analysis is ongoing as further data is collected. Coordinates were calculated using SNAP v2.3.61. Stations were constrained using coordinates calculated by GNS Science. Some coordinates were calculated from data provided by Christchurch City Council and other public and private organisations. No precise levelling data has been used.</p>
<p>The uncertainty (one standard deviation) is 0.02m horizontally, and 0.03m vertically for NZGD2000 ellipsoidal heights. The uncertainty (one standard deviation) of the Lyttelton Vertical Datum 1937 and Christchurch Drainage Datum heights is 0.05m.</p>
<p>The coordinates calculated prior to 2010-09-04 have been calculated from a combined adjustment including LINZ data and additional data provided by public and private organisations. These coordinates differ from those in the Geodetic Database and more accurately reflect the position of the mark immediately prior to the 2010-09-04 earthquake.</p>
<p>The deformation model igns2011_working.grd calculated from a model (v4) provided by GNS Science on 28 April 2011 was used to remove secular deformation.</p>
<p>Lyttelton Vertical Datum 1937 heights have been computed from NZGD2000 ellipsoidal heights by subtracting NZGeoid2009 geoid heights and adding an offset of 0.47m to bring in terms of Lyttelton Vertical Datum 1937. Christchurch Drainage Datum (CDD) heights have been computed in the Christchurch area from NZGD2000 ellipsoidal heights by subtracting NZGeoid2009 geoid heights and adding an offset of 0.523m (specifically calculated for Christchurch City) to bring in terms of Lyttelton Vertical Datum 1937 (for Christchurch) and a further offset of 9.04m to bring in terms of CDD.</p>
<p>The model used to estimate whether movements greater than 2cm occurred at a mark (excluding those due to liquefaction or other localised deformation) after the 2010-09-04 earthquake was provided by GNS Science (Darfield_Sep2010_model_8.5_grid_displacements_calcs.xls). The model used to estimate whether movements greater than 2cm occurred at a mark (excluding those due to liquefaction or other localised deformation) after the 2011-02-22 earthquake was provided by GNS Science (Chch_Feb2011_geodetic_source_model_3.21.xls). The model used to estimate whether movements greater than 2cm occurred at a mark (excluding those due to liquefaction or other localised deformation) after the 2011-06-13 earthquake was provided by GNS Science (Chch_Jun2011_geodetic_source_model_0.4.xls). The model used to estimate whether movements greater than 2cm occurred at a mark (excluding those due to liquefaction or other localised deformation) after the 2011-12-23 earthquake was provided by GNS Science (Chch_Dec2011_geodetic_source_model_0.2.xls).</p>
<p>These coordinates are suitable for use in surveys and other geospatial activities in Canterbury and Christchurch.</p>
<p><strong>For full information about this dataset, see <a href="http://www.linz.govt.nz/survey-titles/canterbury-earthquake/canterbury-earthquake/geodetic-survey-control-coordinates">the Canterbury earthquake information</a> on the LINZ website.</strong></p>
From: <a href="https://data.linz.govt.nz/group/ngo/" title="Profile for National Geodetic Office">National Geodetic Office</a><br />
Added: 26 Apr 2013<br />
Updated: 26 Apr 2013<br />
Moturiki 1953 to NZVD2016 Conversiontag:data.linz.govt.nz,2016-08:layers:534482016-08-04T22:55:03.777319+00:002016-08-04T22:53:55.513298+00:00
<a class="kxThumbnail" href="https://data.linz.govt.nz/layer/53448-moturiki-1953-to-nzvd2016-conversion/" title="Details for Moturiki 1953 to NZVD2016 Conversion"><img src="//tiles-cdn.koordinates.com/services/tiles/v4/thumbnail/layer=53448.156596,style=auto/90x70.png" alt="Moturiki 1953 to NZVD2016 Conversion thumbnail"/></a><br />
<br /><strong>Updated with new data on 04 Aug 2016</strong><br />
<p>The MOT53-NZVD2016 grid enables the conversion of normal-orthometric heights from the Moturiki 1953 local vertical datum to the New Zealand Vertical Datum 2016 (NZVD2016). </p>
<p>The conversion value is represented by the attribute “O”, in metres. </p>
<p>This conversion and NZVD2016 are formally defined in the LINZ standard <a href="http://www.linz.govt.nz/regulatory/25009">LINZS25009</a>. </p>
<p>MOT53-NZVD2016 is published on a two arc-minute grid (approximately 3.6 kilometres) extending over the benchmarks that nominally define the extent of the Moturiki 1953 vertical datum (174.5° E to 178.26° E, 36.5° S to 40.7° S). </p>
<p>The height conversion grid models the difference between the Moturiki 1953 vertical datum and NZVD2016 using the LINZ GPS-levelling marks. From the GPS-levelling marks the expected accuracy of MOT53-NZVD2016 is better than 2 centimetres (95% Confidence interval). </p>
<p>More information on converting heights between vertical datums can be found <a href="http://www.linz.govt.nz/data/geodetic-services/coordinate-conversion/converting-between-nzvd2016-nzgd2000-and-local-vertical-datums">on the LINZ website</a>.</p>
From: <a href="https://data.linz.govt.nz/group/ngo/" title="Profile for National Geodetic Office">National Geodetic Office</a><br />
Added: 04 Aug 2016<br />
Updated: 04 Aug 2016<br />
Auckland 1946 to NZGD2000 Conversiontag:data.linz.govt.nz,2016-07:layers:534162016-07-18T20:21:41.807887+00:002016-08-02T21:18:22.529725+00:00
<a class="kxThumbnail" href="https://data.linz.govt.nz/layer/53416-auckland-1946-to-nzgd2000-conversion/" title="Details for Auckland 1946 to NZGD2000 Conversion"><img src="//tiles-cdn.koordinates.com/services/tiles/v4/thumbnail/layer=53416.156550,style=auto/90x70.png" alt="Auckland 1946 to NZGD2000 Conversion thumbnail"/></a><br />
<br /><strong>Updated with new data on 02 Aug 2016</strong><br />
<p>The AUK46-NZGD2000 grid enables the conversion of normal-orthometric heights from the Auckland 1946 local vertical datum directly to New Zealand Geodetic Datum 2000 (NZGD2000) ellipsoidal heights. </p>
<p>AUK46-NZGD2000 is published on a one arc-minute grid (approximately 1.8 kilometres) extending over the benchmarks that nominally define the extent of the Auckland 1946 vertical datum (174.0° E to 176.2° E, 36.1° S to 38.0° S). </p>
<p>The conversion value is represented by the attribute “delta”, in metres. </p>
<p>This grid is a combination of New Zealand Quasigeoid 2016 <a href="https://data.linz.govt.nz/layer/3418">NZGeoid2016</a> and the <a href="https://data.linz.govt.nz/layer/3417">AUK46-NZVD2016</a> height conversion grid. Where NZGeoid2016 is the reference surface for the New Zealand Vertical Datum 2016 (NZVD2016), while the AUK46-NZVD2016 grid models the difference between the Auckland 1946 vertical datum and NZVD2016 using the LINZ GPS-levelling marks. </p>
<p>More information on converting heights between vertical datums can be found <a href="http://www.linz.govt.nz/data/geodetic-services/coordinate-conversion/converting-between-nzvd2016-nzgd2000-and-local-vertical-datums">on the LINZ website</a>.</p>
From: <a href="https://data.linz.govt.nz/group/ngo/" title="Profile for National Geodetic Office">National Geodetic Office</a><br />
Added: 18 Jul 2016<br />
Updated: 02 Aug 2016<br />
NZ Kaikoura Earthquake (14 Nov 2016) Geodetic Markstag:data.linz.govt.nz,2016-12:layers:535272016-12-08T00:34:06.973002+00:002017-01-24T20:29:28.931658+00:00
<a class="kxThumbnail" href="https://data.linz.govt.nz/layer/53527-nz-kaikoura-earthquake-14-nov-2016-geodetic-marks/" title="Details for NZ Kaikoura Earthquake (14 Nov 2016) Geodetic Marks"><img src="//tiles-cdn.koordinates.com/services/tiles/v4/thumbnail/layer=53527.162081,style=auto/90x70.png" alt="NZ Kaikoura Earthquake (14 Nov 2016) Geodetic Marks thumbnail"/></a><br />
<br /><strong>Updated with new data on 24 Jan 2017</strong><br />
<p><strong>For further information about this dataset, see <a href="http://www.linz.govt.nz/land/surveying/canterbury-earthquakes/geodetic-survey-control-network/kaikoura-earthquake-%E2%80%93-14-november-2016">the Kaikoura earthquake information</a>.</strong> </p>
<p>It is likely that many of these coordinates will be updated multiple times as marks move due to aftershocks and ongoing post-seismic deformation. It is therefore critical that the <strong>datum version</strong> and <strong>coordinate epoch</strong> date are recorded with any coordinates sourced from this dataset, along with the date the coordinates were accessed or downloaded. </p>
<p>These coordinates are computed from Continuously Operating Reference Station (CORS) data and geodetic surveys undertaken after the 14 November 2016 Kaikoura earthquake. They reflect earthquake movements up until the epoch date that is associated with each coordinate. Where possible, coordinates sourced from this dataset for use as control or calibration points in a project should be at the same or similar epochs. If not, post-seismic deformation may mean that new observations or coordinates do not fit well with these coordinates. Coordinates used as control or calibration points should also be well-distributed over the project area, so that any discrepancies resulting from the survey date being significantly different from the coordinate epoch date can be identified. If such discrepancies are identified, it may be necessary to use the <a href="http://www.linz.govt.nz/positionzpp">LINZ PositioNZ-PP online processing service</a> to generate control coordinates at the same (or nearly the same) epoch as the survey date. </p>
<p>Coordinates were calculated using SNAP v2.5.48. The origin of non-CORS coordinates is PositioNZ CORS that have been updated to include earthquake movements. </p>
<p>The 95% confidence interval uncertainties of coordinates are 0.02m horizontally and 0.03m vertically, relative to the PositioNZ network, at the epoch specified. In areas experiencing significant ongoing seismic activity, coordinates at the same mark at other epochs may differ by more than these uncertainties. </p>
<p>These coordinates are suitable for use in surveys and other geospatial positioning activities in the area impacted by the Kaikoura earthquake.</p>
From: <a href="https://data.linz.govt.nz/group/ngo/" title="Profile for National Geodetic Office">National Geodetic Office</a><br />
Added: 08 Dec 2016<br />
Updated: 24 Jan 2017<br />
NZ Quasigeoid 2016tag:data.linz.govt.nz,2016-07:layers:534182016-07-19T07:23:19.382376+00:002016-07-21T02:04:46.896889+00:00
<a class="kxThumbnail" href="https://data.linz.govt.nz/layer/53418-nz-quasigeoid-2016/" title="Details for NZ Quasigeoid 2016"><img src="//tiles-cdn.koordinates.com/services/tiles/v4/thumbnail/layer=53418.156228,style=auto/90x70.png" alt="NZ Quasigeoid 2016 thumbnail"/></a><br />
<br /><strong>Updated with new data on 21 Jul 2016</strong><br />
<p>The relationship between the GRS80 ellipsoid and the New Zealand Vertical Datum 2016 (NZVD2016) is modelled by the New Zealand Quasigeoid 2016 (NZGeoid2016). The relationship value is represented by the attribute “N”, in metres. </p>
<p>This relationship and NZVD2016 is formally defined in the LINZ standard <a href="http://www.linz.govt.nz/regulatory/25009">LINZS25009</a>. </p>
<p>NZGeoid2016 can be used to convert New Zealand Geodetic Datum 2000 (NZGD2000) ellipsoidal heights to NZVD2016 normal-orthometric heights. </p>
<p>The conversion value is represented by the attribute “N”, in metres. </p>
<p>NZGeoid2016 is published on a one arc-minute grid (approximately 1.8 kilometres) over the New Zealand continental shelf (160° E to 170° W, 25° S to 60° S). </p>
<p>NZGeoid2016 was calculated by enhancing the EIGEN-6C4 global gravity model with, terrestrial, ship-track, satellite and airborne gravity data. GPS-levelling observations were not used to compute NZGeoid2016. </p>
<p><strong>Users may also be interested in transforming heights to any of the 13 historic local vertical datums used in New Zealand using the appropriate datum relationship grid displayed in the <a href="http://data.linz.govt.nz/layer/3419">NZ Height Conversion Index</a>.</strong> </p>
<p>More information on these transformations is available <a href="http://www.linz.govt.nz/data/geodetic-services/coordinate-conversion/converting-between-nzvd2016-nzgd2000-and-local-vertical-datums">on the LINZ website</a>.</p>
From: <a href="https://data.linz.govt.nz/group/ngo/" title="Profile for National Geodetic Office">National Geodetic Office</a><br />
Added: 19 Jul 2016<br />
Updated: 21 Jul 2016<br />
Canterbury Earthquake Precise-Levelling Heights (2010, 2011)tag:data.linz.govt.nz,2013-06:layers:516882013-06-25T03:23:52.306816+00:002014-09-04T02:58:29.474036+00:00
<a class="kxThumbnail" href="https://data.linz.govt.nz/layer/51688-canterbury-earthquake-precise-levelling-heights-2010-2011/" title="Details for Canterbury Earthquake Precise-Levelling Heights (2010, 2011)"><img src="//tiles-cdn.koordinates.com/services/tiles/v4/thumbnail/layer=51688.137912,style=auto/90x70.png" alt="Canterbury Earthquake Precise-Levelling Heights (2010, 2011) thumbnail"/></a><br />
<br /><strong>Updated with new data on 04 Sep 2014</strong><br />
<p>The Canterbury region of New Zealand experienced a sequence of significant earthquakes during 2010 and 2011. These earthquakes occurred on 2010-09-04, 2011-02-22, 2011-06-13 and 2011-12-23. Precise-levelling surveys have been carried out throughout Canterbury and Christchurch to re-establish heights after these earthquakes. </p>
<p><strong>Users may also be interested in the horizontal coordinates derived from GNSS data in the companion layers <a href="http://data.linz.govt.nz/layer/1588">Canterbury Earthquake Geodetic Marks (2010, 2011) - Comprehensive</a> and <a href="http://data.linz.govt.nz/layer/1589">Canterbury Earthquake Geodetic Marks (2010, 2011) - Simple</a></strong> </p>
<p>Horizontal Accuracy (standard deviation) approx 1m.<br>
Vertical Accuracy of Lyttelton Vertical Datum 1937 heights (standard deviation) 0.005m. </p>
<p>Heights generated from precise levelling data undertaken to a misclose standard (mm) of 5*sqrt(k) where k is the distance in kilometres. Precise levelling in the Christchurch area was undertaken after the 23 December 2011 earthquake. Other areas were levelled after the most recent earthquake to have affected heights in that area. Heights therefore represent the position of marks accounting for all four substantial Canterbury earthquakes. </p>
<p>These heights are only provisional. Analysis is ongoing as further data is collected.<br>
Heights calculated using SNAP v2.3.64.<br>
Heights were constrained using the pre-earthquake heights at geodetic codes AC9B, AFAQ, AG32 and B853. GNSS observations and modelling indicates that the height change of these marks was negligible.<br>
Some heights were calculated from precise levelling data provided by Christchurch City Council. </p>
<p>These coordinates are suitable for use in surveys and other geospatial activities in Canterbury and Christchurch. </p>
<p><strong>For further information about this dataset, see <a href="http://www.linz.govt.nz/survey-titles/canterbury-earthquake/canterbury-earthquake/geodetic-survey-control-coordinates">the Canterbury earthquake information</a> on the LINZ website.</strong></p>
From: <a href="https://data.linz.govt.nz/group/ngo/" title="Profile for National Geodetic Office">National Geodetic Office</a><br />
Added: 25 Jun 2013<br />
Updated: 04 Sep 2014<br />
Gisborne 1926 to NZVD2016 Conversiontag:data.linz.govt.nz,2016-07:layers:534302016-07-25T20:44:58.191394+00:002016-08-03T19:41:45.108418+00:00
<a class="kxThumbnail" href="https://data.linz.govt.nz/layer/53430-gisborne-1926-to-nzvd2016-conversion/" title="Details for Gisborne 1926 to NZVD2016 Conversion"><img src="//tiles-cdn.koordinates.com/services/tiles/v4/thumbnail/layer=53430.156588,style=auto/90x70.png" alt="Gisborne 1926 to NZVD2016 Conversion thumbnail"/></a><br />
<br /><strong>Updated with new data on 03 Aug 2016</strong><br />
<p>The GSB26-NZVD2016 grid enables the conversion of normal-orthometric heights from the Gisborne 1926 local vertical datum to the New Zealand Vertical Datum 2016 (NZVD2016).</p>
<p>The conversion value is represented by the attribute “O”, in metres.</p>
<p>This conversion and NZVD2016 are formally defined in the LINZ standard <a href="http://www.linz.govt.nz/regulatory/25009">LINZS25009</a>.</p>
<p>GSB26-NZVD2016 is published on a two arc-minute grid (approximately 3.6 kilometres) extending over the benchmarks that nominally define the extent of the Gisborne 1926 vertical datum (177.0° E to 178.6° E, 37.4° S to 39.0° S).</p>
<p>The height conversion grid models the difference between the Gisborne 1926 vertical datum and NZVD2016 using the LINZ GPS-levelling marks. From the GPS-levelling marks the expected accuracy of GSB26-NZVD2016 is better than 2 centimetres (95% Confidence interval).</p>
<p>More information on converting heights between vertical datums can be found <a href="http://www.linz.govt.nz/data/geodetic-services/coordinate-conversion/converting-between-nzvd2016-nzgd2000-and-local-vertical-datums">on the LINZ website</a>.</p>
From: <a href="https://data.linz.govt.nz/group/ngo/" title="Profile for National Geodetic Office">National Geodetic Office</a><br />
Added: 25 Jul 2016<br />
Updated: 03 Aug 2016<br />
NZ Government GNSS CORStag:data.linz.govt.nz,2011-09:layers:510292011-09-20T01:33:11.599409+00:002019-08-22T02:26:17.793203+00:00
<a class="kxThumbnail" href="https://data.linz.govt.nz/layer/51029-nz-government-gnss-cors/" title="Details for NZ Government GNSS CORS"><img src="//tiles-cdn.koordinates.com/services/tiles/v4/thumbnail/layer=51029.323662,style=auto/90x70.png" alt="NZ Government GNSS CORS thumbnail"/></a><br />
<br /><strong>Updated with new data on 22 Aug 2019</strong><br />
<p>The NZGD2000 Government CORS provides the locations of GNSS Continuously Operating Reference Stations operated by GNS Science under the GeoNet project (<a href="http://www.geonet.org.nz">www.geonet.org.nz</a>). Coordinates are from the LINZ Geodetic Database, in NZGD2000. </p>
<p>These are split into several different networks: </p>
<ul>
<li>PositioNZ - stations predominantly funded by LINZ, with some GeoNet funding. These provide a nationwide coverage of ~120km spacing. More info <a href="http://apps.linz.govt.nz/positionz/">here</a> </li>
<li>GeoNet - stations funded by the GeoNet project. These are located in areas of geophysical interest, usually on the East Coast of the North Island. More info <a href="http://www.geonet.org.nz">here</a> </li>
<li>SAGENZ - stations funded by the University of Otago, GNS Science, MIT, University of Colorado and UNAVCO. These Southern Alps Geodetic Experiment - New Zealand stations are generally semi-continuous sites. </li>
<li>Tide Gauge - stations co-located with tide gauges at major ports. Data is managed through the GeoNet project also. </li>
</ul>
<p>30" RINEX data from all of these sites is available from the <a href="http://www.geonet.org.nz">GeoNet website</a> </p>
<p>Real Time data is available from all PositioNZ stations, and some GeoNet stations. For more information, see the <a href="http://apps.linz.govt.nz/positionz/rt/index.php">PositioNZ-RT website</a></p>
From: <a href="https://data.linz.govt.nz/group/ngo/" title="Profile for National Geodetic Office">National Geodetic Office</a><br />
Added: 20 Sep 2011<br />
Updated: 22 Aug 2019<br />
Wellington 1953 to NZVD2016 Conversiontag:data.linz.govt.nz,2016-07:layers:534462016-07-25T21:08:55.708472+00:002016-08-03T19:31:36.252115+00:00
<a class="kxThumbnail" href="https://data.linz.govt.nz/layer/53446-wellington-1953-to-nzvd2016-conversion/" title="Details for Wellington 1953 to NZVD2016 Conversion"><img src="//tiles-cdn.koordinates.com/services/tiles/v4/thumbnail/layer=53446.156577,style=auto/90x70.png" alt="Wellington 1953 to NZVD2016 Conversion thumbnail"/></a><br />
<br /><strong>Updated with new data on 03 Aug 2016</strong><br />
<p>The WGN53-NZVD2016 grid enables the conversion of normal-orthometric heights from the Wellington 1953 local vertical datum to the New Zealand Vertical Datum 2016 (NZVD2016). </p>
<p>The conversion value is represented by the attribute “O”, in metres. </p>
<p>This conversion and NZVD2016 are formally defined in the LINZ standard <a href="http://www.linz.govt.nz/regulatory/25009">LINZS25009</a>. </p>
<p>WGN53-NZVD2016 is published on a two arc-minute grid (approximately 3.6 kilometres) extending over the benchmarks that nominally define the extent of the Wellington 1953 vertical datum (174.4° E to 176.4° E, 39.1° S to 41.6° S). </p>
<p>The height conversion grid models the difference between the Wellington 1953 vertical datum and NZVD2016 using the LINZ GPS-levelling marks. From the GPS-levelling marks the expected accuracy of WGN53-NZVD2016 is better than 2 centimetres (95% Confidence interval). </p>
<p>More information on converting heights between vertical datums can be found <a href="http://www.linz.govt.nz/data/geodetic-services/coordinate-conversion/converting-between-nzvd2016-nzgd2000-and-local-vertical-datums">on the LINZ website</a>.</p>
From: <a href="https://data.linz.govt.nz/group/ngo/" title="Profile for National Geodetic Office">National Geodetic Office</a><br />
Added: 25 Jul 2016<br />
Updated: 03 Aug 2016<br />
Lyttelton 1937 to NZVD2016 Conversiontag:data.linz.govt.nz,2016-07:layers:534322016-07-25T20:47:10.702441+00:002016-08-03T19:42:30.979705+00:00
<a class="kxThumbnail" href="https://data.linz.govt.nz/layer/53432-lyttelton-1937-to-nzvd2016-conversion/" title="Details for Lyttelton 1937 to NZVD2016 Conversion"><img src="//tiles-cdn.koordinates.com/services/tiles/v4/thumbnail/layer=53432.156589,style=auto/90x70.png" alt="Lyttelton 1937 to NZVD2016 Conversion thumbnail"/></a><br />
<br /><strong>Updated with new data on 03 Aug 2016</strong><br />
<p>The LTN37-NZVD2016 grid enables the conversion of normal-orthometric heights from the Lyttelton 1937 local vertical datum to the New Zealand Vertical Datum 2016 (NZVD2016). </p>
<p>The conversion value is represented by the attribute “O”, in metres. </p>
<p>This conversion and NZVD2016 are formally defined in the LINZ standard <a href="http://www.linz.govt.nz/regulatory/25009">LINZS25009</a>. </p>
<p>LTN37-NZVD2016 is published on a two arc-minute grid (approximately 3.6 kilometres) extending over the benchmarks that nominally define the extent of the Lyttelton 1937 vertical datum (168.53° E to 174.2° E, 41.3° S to 45.1° S). </p>
<p>The height conversion grid models the difference between the Lyttelton 1937 vertical datum and NZVD2016 using the LINZ GPS-levelling marks. From the GPS-levelling marks the expected accuracy of LTN37-NZVD2016 is better than 2 centimetres (95% Confidence interval). </p>
<p>More information on converting heights between vertical datums can be found <a href="http://www.linz.govt.nz/data/geodetic-services/coordinate-conversion/converting-between-nzvd2016-nzgd2000-and-local-vertical-datums">on the LINZ website</a>.</p>
From: <a href="https://data.linz.govt.nz/group/ngo/" title="Profile for National Geodetic Office">National Geodetic Office</a><br />
Added: 25 Jul 2016<br />
Updated: 03 Aug 2016<br />
One Tree Point 1964 to NZVD2016 Conversiontag:data.linz.govt.nz,2016-07:layers:534402016-07-25T21:01:42.354521+00:002016-08-03T19:33:33.560725+00:00
<a class="kxThumbnail" href="https://data.linz.govt.nz/layer/53440-one-tree-point-1964-to-nzvd2016-conversion/" title="Details for One Tree Point 1964 to NZVD2016 Conversion"><img src="//tiles-cdn.koordinates.com/services/tiles/v4/thumbnail/layer=53440.156580,style=auto/90x70.png" alt="One Tree Point 1964 to NZVD2016 Conversion thumbnail"/></a><br />
<br /><strong>Updated with new data on 03 Aug 2016</strong><br />
<p>The OTP64-NZVD2016 grid enables the conversion of normal-orthometric heights from the One Tree Point 1964 local vertical datum to the New Zealand Vertical Datum 2016 (NZVD2016). </p>
<p>The conversion value is represented by the attribute “O”, in metres. </p>
<p>This conversion and NZVD2016 are formally defined in the LINZ standard <a href="http://www.linz.govt.nz/regulatory/25009">LINZS25009</a>. </p>
<p>OTP64-NZVD2016 is published on a two arc-minute grid (approximately 3.6 kilometres) extending over the benchmarks that nominally define the extent of the One Tree Point 1964 vertical datum (171.3° E to 174.4° E, 40.4° S to 42.7° S). </p>
<p>The height conversion grid models the difference between the One Tree Point 1964 vertical datum and NZVD2016 using the LINZ GPS-levelling marks. From the GPS-levelling marks the expected accuracy of OTP64-NZVD2016 is better than 1 centimetre (95% Confidence interval). </p>
<p>More information on converting heights between vertical datums can be found <a href="http://www.linz.govt.nz/data/geodetic-services/coordinate-conversion/converting-between-nzvd2016-nzgd2000-and-local-vertical-datums">on the LINZ website</a>.</p>
From: <a href="https://data.linz.govt.nz/group/ngo/" title="Profile for National Geodetic Office">National Geodetic Office</a><br />
Added: 25 Jul 2016<br />
Updated: 03 Aug 2016<br />
Dunedin 1958 to NZVD2016 Conversiontag:data.linz.govt.nz,2016-07:layers:534282016-07-25T20:29:52.604388+00:002016-08-03T19:41:10.657983+00:00
<a class="kxThumbnail" href="https://data.linz.govt.nz/layer/53428-dunedin-1958-to-nzvd2016-conversion/" title="Details for Dunedin 1958 to NZVD2016 Conversion"><img src="//tiles-cdn.koordinates.com/services/tiles/v4/thumbnail/layer=53428.156587,style=auto/90x70.png" alt="Dunedin 1958 to NZVD2016 Conversion thumbnail"/></a><br />
<br /><strong>Updated with new data on 03 Aug 2016</strong><br />
<p>The DUN58-NZVD2016 grid enables the conversion of normal-orthometric heights from the Dunedin 1958 local vertical datum to the New Zealand Vertical Datum 2016 (NZVD2016). </p>
<p>The conversion value is represented by the attribute “O”, in metres. </p>
<p>This conversion and NZVD2016 are formally defined in the LINZ standard <a href="http://www.linz.govt.nz/regulatory/25009">LINZS25009</a>. </p>
<p>DUN58-NZVD2016 is published on a two arc-minute grid (approximately 3.6 kilometres) extending over the benchmarks that nominally define the extent of the Dunedin 1958 vertical datum (168.4° E to 171.3° E, 43.9° S to 46.5° S). </p>
<p>The height conversion grid models the difference between the Dunedin 1958 vertical datum and NZVD2016 using the LINZ GPS-levelling marks. From the GPS-levelling marks the expected accuracy of DUN58-NZVD2016 is better than 2 centimetres (95% Confidence interval). </p>
<p>More information on converting heights between vertical datums can be found <a href="http://www.linz.govt.nz/data/geodetic-services/coordinate-conversion/converting-between-nzvd2016-nzgd2000-and-local-vertical-datums">on the LINZ website</a>.</p>
From: <a href="https://data.linz.govt.nz/group/ngo/" title="Profile for National Geodetic Office">National Geodetic Office</a><br />
Added: 25 Jul 2016<br />
Updated: 03 Aug 2016<br />
Auckland 1946 to NZVD2016 Conversiontag:data.linz.govt.nz,2016-07:layers:534172016-07-19T06:21:23.513544+00:002016-08-03T19:36:18.835154+00:00
<a class="kxThumbnail" href="https://data.linz.govt.nz/layer/53417-auckland-1946-to-nzvd2016-conversion/" title="Details for Auckland 1946 to NZVD2016 Conversion"><img src="//tiles-cdn.koordinates.com/services/tiles/v4/thumbnail/layer=53417.156581,style=auto/90x70.png" alt="Auckland 1946 to NZVD2016 Conversion thumbnail"/></a><br />
<br /><strong>Updated with new data on 03 Aug 2016</strong><br />
<p>The AUK46-NZVD2016 grid enables the conversion of normal-orthometric heights from the Auckland 1946 local vertical datum to the New Zealand Vertical Datum 2016 (NZVD2016). </p>
<p>The conversion value is represented by the attribute “O”, in metres. </p>
<p>This conversion and NZVD2016 are formally defined in the LINZ standard <a href="http://www.linz.govt.nz/regulatory/25009">LINZS25009</a>. </p>
<p>AUK46-NZVD2016 is published on a two arc-minute grid (approximately 3.6 kilometres) extending over the benchmarks that nominally define the extent of the Auckland 1946 vertical datum (174.0° E to 176.2° E, 36.1° S to 38.0° S). </p>
<p>The height conversion grid models the difference between the Auckland 1946 vertical datum and NZVD2016 using the LINZ GPS-levelling marks. From the GPS-levelling marks the expected accuracy of AUK46-NZVD2016 is better than 2 centimetres (95% Confidence interval). </p>
<p>More information on converting heights between vertical datums can be found <a href="http://www.linz.govt.nz/data/geodetic-services/coordinate-conversion/converting-between-nzvd2016-nzgd2000-and-local-vertical-datums">on the LINZ website</a>.</p>
From: <a href="https://data.linz.govt.nz/group/ngo/" title="Profile for National Geodetic Office">National Geodetic Office</a><br />
Added: 19 Jul 2016<br />
Updated: 03 Aug 2016<br />
Canterbury Earthquake Geodetic Marks (2010, 2011) - Simpletag:data.linz.govt.nz,2013-04:layers:515892013-04-26T02:54:33.893030+00:002013-04-26T02:53:07.136656+00:00
<a class="kxThumbnail" href="https://data.linz.govt.nz/layer/51589-canterbury-earthquake-geodetic-marks-2010-2011-simple/" title="Details for Canterbury Earthquake Geodetic Marks (2010, 2011) - Simple"><img src="//tiles-cdn.koordinates.com/services/tiles/v4/thumbnail/layer=51589.131836,style=auto/90x70.png" alt="Canterbury Earthquake Geodetic Marks (2010, 2011) - Simple thumbnail"/></a><br />
<br /><strong>Updated with new data on 26 Apr 2013</strong><br />
<p>The Canterbury region of New Zealand experienced a sequence of significant earthquakes during 2010 and 2011. These earthquakes occurred on 2010-09-04, 2011-02-22, 2011-06-13 and 2011-12-23. The coordinates in this layer account for all significant movements relating to these, so should be consistent with any observations made after the last earthquake to affect a given area (neglecting localised deformation such as that due to liquefaction).</p>
<p><strong>Users may also be interested in the more comprehensive data in the companion layer <a href="http://data.linz.govt.nz/layer/1588">Canterbury Earthquake Geodetic Marks (2010, 2011) - Comprehensive</a>.</strong></p>
<p>These coordinates are only provisional. Analysis is ongoing as further data is collected. Coordinates were calculated using SNAP v2.3.61. Stations were constrained using coordinates calculated by GNS Science. Some coordinates were calculated from data provided by Christchurch City Council. No precise levelling data has been used.</p>
<p>The estimated accuracy is 0.02m horizontally and 0.03m vertically. </p>
<p>The deformation model igns2011_working.grd calculated from a model (v4) provided by GNS Science on 28 April 2011 was used to remove secular deformation.</p>
<p>These coordinates are suitable for use in surveys and other geospatial activities in Canterbury and Christchurch.</p>
<p><strong>For further information about this dataset, see <a href="http://www.linz.govt.nz/survey-titles/canterbury-earthquake/canterbury-earthquake/geodetic-survey-control-coordinates">the Canterbury earthquake information</a> on the LINZ website.</strong></p>
From: <a href="https://data.linz.govt.nz/group/ngo/" title="Profile for National Geodetic Office">National Geodetic Office</a><br />
Added: 26 Apr 2013<br />
Updated: 26 Apr 2013<br />
Wellington 1953 to NZGD2000 Conversiontag:data.linz.govt.nz,2016-07:layers:534452016-07-25T21:07:42.057545+00:002016-08-02T21:41:56.277935+00:00
<a class="kxThumbnail" href="https://data.linz.govt.nz/layer/53445-wellington-1953-to-nzgd2000-conversion/" title="Details for Wellington 1953 to NZGD2000 Conversion"><img src="//tiles-cdn.koordinates.com/services/tiles/v4/thumbnail/layer=53445.156574,style=auto/90x70.png" alt="Wellington 1953 to NZGD2000 Conversion thumbnail"/></a><br />
<br /><strong>Updated with new data on 02 Aug 2016</strong><br />
<p>The WGN53-NZGD2000 grid enables the conversion of normal-orthometric heights from the Wellington 1953local vertical datum directly to New Zealand Geodetic Datum 2000 (NZGD2000) ellipsoidal heights. </p>
<p>WGN53-NZGD2000 is published on a one arc-minute grid (approximately 1.8 kilometres) extending over the benchmarks that nominally define the extent of the Wellington 1953 vertical datum (174.4° E to 176.4° E, 39.1° S to 41.6° S). </p>
<p>The conversion value is represented by the attribute “delta”, in metres. </p>
<p>This grid is a combination of New Zealand Quasigeoid 2016 <a href="https://data.linz.govt.nz/layer/3418">NZGeoid2016</a> and the <a href="https://data.linz.govt.nz/layer/3446">WGN53-NZVD2016</a> height conversion grid. Where NZGeoid2016 is the reference surface for the New Zealand Vertical Datum 2016 (NZVD2016), while the WGN53-NZVD2016 grid models the difference between the Wellington 1953 vertical datum and NZVD2016 using the LINZ GPS-levelling marks. </p>
<p>More information on converting heights between vertical datums can be found <a href="http://www.linz.govt.nz/data/geodetic-services/coordinate-conversion/converting-between-nzvd2016-nzgd2000-and-local-vertical-datums">on the LINZ website</a>.</p>
From: <a href="https://data.linz.govt.nz/group/ngo/" title="Profile for National Geodetic Office">National Geodetic Office</a><br />
Added: 25 Jul 2016<br />
Updated: 02 Aug 2016<br />
Moturiki 1953 to NZGD2000 Conversiontag:data.linz.govt.nz,2016-07:layers:534332016-07-25T20:49:51.344251+00:002016-08-02T21:25:44.909185+00:00
<a class="kxThumbnail" href="https://data.linz.govt.nz/layer/53433-moturiki-1953-to-nzgd2000-conversion/" title="Details for Moturiki 1953 to NZGD2000 Conversion"><img src="//tiles-cdn.koordinates.com/services/tiles/v4/thumbnail/layer=53433.156562,style=auto/90x70.png" alt="Moturiki 1953 to NZGD2000 Conversion thumbnail"/></a><br />
<br /><strong>Updated with new data on 02 Aug 2016</strong><br />
<p>The MOT53-NZGD2000 grid enables the conversion of normal-orthometric heights from the Moturiki 1953 local vertical datum directly to New Zealand Geodetic Datum 2000 (NZGD2000) ellipsoidal heights. </p>
<p>MOT53-NZGD2000 is published on a one arc-minute grid (approximately 1.8 kilometres) extending over the benchmarks that nominally define the extent of the Moturiki 1953 vertical datum (174.5° E to 178.26° E, 36.5° S to 40.7° S). </p>
<p>The conversion value is represented by the attribute “delta”, in metres. </p>
<p>This grid is a combination of New Zealand Quasigeoid 2016 <a href="https://data.linz.govt.nz/layer/3418">NZGeoid2016</a> and the <a href="https://data.linz.govt.nz/layer/3434">MOT53-NZVD2016</a> height conversion grid. Where NZGeoid2016 is the reference surface for the New Zealand Vertical Datum 2016 (NZVD2016), while the MOT53-NZVD2016 grid models the difference between the Moturiki 1953 vertical datum and NZVD2016 using the LINZ GPS-levelling marks. </p>
<p>More information on converting heights between vertical datums can be found <a href="http://www.linz.govt.nz/data/geodetic-services/coordinate-conversion/converting-between-nzvd2016-nzgd2000-and-local-vertical-datums">on the LINZ website</a>.</p>
From: <a href="https://data.linz.govt.nz/group/ngo/" title="Profile for National Geodetic Office">National Geodetic Office</a><br />
Added: 25 Jul 2016<br />
Updated: 02 Aug 2016<br />
Canterbury Earthquake (14 Feb 2016) Geodetic Markstag:data.linz.govt.nz,2016-02:layers:533222016-02-25T20:38:26.140206+00:002016-06-20T19:37:21.567732+00:00
<a class="kxThumbnail" href="https://data.linz.govt.nz/layer/53322-canterbury-earthquake-14-feb-2016-geodetic-marks/" title="Details for Canterbury Earthquake (14 Feb 2016) Geodetic Marks"><img src="//tiles-cdn.koordinates.com/services/tiles/v4/thumbnail/layer=53322.155374,style=auto/90x70.png" alt="Canterbury Earthquake (14 Feb 2016) Geodetic Marks thumbnail"/></a><br />
<br /><strong>Updated with new data on 20 Jun 2016</strong><br />
<p>Coordinates computed from surveys undertaken after the 14 February 2016 Canterbury earthquake. These should be consistent with any observations made after this earthquake (neglecting any localised deformation such as that due to liquefaction). </p>
<p><strong>For further information about this dataset, see <a href="http://www.linz.govt.nz/land/surveying/canterbury-earthquakes/geodetic-survey-control-network">the Canterbury earthquake information</a>.</strong> </p>
<p>These coordinates are only provisional. Analysis is ongoing as further data is collected. Coordinates were calculated using SNAP v2.5.33. Stations were constrained using coordinates of distant PositioNZ continuous GNSS stations that were unaffected by the earthquake. </p>
<p>The standard deviations of coordinates are 0.01m horizontally and 0.02m vertically, relative to the PositioNZ network. </p>
<p>Coordinate changes due to the earthquake have been calculated by comparing pre and post-earthquake coordinates. Pre-earthquake coordinates were calculated relative to public and private continuous GNSS stations. These continuous GNSS stations had data processed for several days early in 2016 (before the earthquake). Other pre-earthquake geodetic data was then readjusted with the continuous GNSS data. Note that this means these coordinate changes may differ slightly from those that would be calculated by comparing the post-earthquake coordinates with those currently in the Geodetic Database. </p>
<p>These coordinates are suitable for use in surveys and other geospatial activities in Canterbury and Christchurch.</p>
From: <a href="https://data.linz.govt.nz/group/ngo/" title="Profile for National Geodetic Office">National Geodetic Office</a><br />
Added: 25 Feb 2016<br />
Updated: 20 Jun 2016<br />
Nelson 1955 to NZVD2016 Conversiontag:data.linz.govt.nz,2016-07:layers:534382016-07-25T20:57:38.842888+00:002016-08-03T19:37:39.649271+00:00
<a class="kxThumbnail" href="https://data.linz.govt.nz/layer/53438-nelson-1955-to-nzvd2016-conversion/" title="Details for Nelson 1955 to NZVD2016 Conversion"><img src="//tiles-cdn.koordinates.com/services/tiles/v4/thumbnail/layer=53438.156582,style=auto/90x70.png" alt="Nelson 1955 to NZVD2016 Conversion thumbnail"/></a><br />
<br /><strong>Updated with new data on 03 Aug 2016</strong><br />
<p>The NSN55-NZVD2016 grid enables the conversion of normal-orthometric heights from the Nelson 1955 local vertical datum to the New Zealand Vertical Datum 2016 (NZVD2016). </p>
<p>The conversion value is represented by the attribute “O”, in metres. </p>
<p>This conversion and NZVD2016 are formally defined in the LINZ standard <a href="http://www.linz.govt.nz/regulatory/25009">LINZS25009</a>. </p>
<p>NSN55-NZVD2016 is published on a two arc-minute grid (approximately 3.6 kilometres) extending over the benchmarks that nominally define the extent of the Nelson 1955 vertical datum (171.3° E to 174.4° E, 40.4° S to 42.7° S). </p>
<p>The height conversion grid models the difference between the Nelson 1955 vertical datum and NZVD2016 using the LINZ GPS-levelling marks. From the GPS-levelling marks the expected accuracy of NSN55-NZVD2016 is better than 2 centimetres (95% Confidence interval). </p>
<p>More information on converting heights between vertical datums can be found <a href="http://www.linz.govt.nz/data/geodetic-services/coordinate-conversion/converting-between-nzvd2016-nzgd2000-and-local-vertical-datums">on the LINZ website</a>.</p>
From: <a href="https://data.linz.govt.nz/group/ngo/" title="Profile for National Geodetic Office">National Geodetic Office</a><br />
Added: 25 Jul 2016<br />
Updated: 03 Aug 2016<br />
Bluff 1955 to NZVD2016 Conversiontag:data.linz.govt.nz,2016-07:layers:534242016-07-25T20:25:53.036489+00:002016-08-03T19:39:13.106429+00:00
<a class="kxThumbnail" href="https://data.linz.govt.nz/layer/53424-bluff-1955-to-nzvd2016-conversion/" title="Details for Bluff 1955 to NZVD2016 Conversion"><img src="//tiles-cdn.koordinates.com/services/tiles/v4/thumbnail/layer=53424.156584,style=auto/90x70.png" alt="Bluff 1955 to NZVD2016 Conversion thumbnail"/></a><br />
<br /><strong>Updated with new data on 03 Aug 2016</strong><br />
<p>The BLF55-NZVD2016 grid enables the conversion of normal-orthometric heights from the Bluff 1955 local vertical datum to the New Zealand Vertical Datum 2016 (NZVD2016). </p>
<p>The conversion value is represented by the attribute “O”, in metres. </p>
<p>This conversion and NZVD2016 are formally defined in the LINZ standard <a href="http://www.linz.govt.nz/regulatory/25009">LINZS25009</a>. </p>
<p>BLF55-NZVD2016 is published on a two arc-minute grid (approximately 3.6 kilometres) extending over the benchmarks that nominally define the extent of the Bluff 1955 vertical datum (168.2° E to 168.9° E, 46.3° S to 46.8° S). </p>
<p>The height conversion grid models the difference between the Bluff 1955 vertical datum and NZVD2016 using the LINZ GPS-levelling marks. From the GPS-levelling marks the expected accuracy of BLF55-NZVD2016 is better than 3 centimetres (95% Confidence interval). </p>
<p>More information on converting heights between vertical datums can be found <a href="http://www.linz.govt.nz/data/geodetic-services/coordinate-conversion/converting-between-nzvd2016-nzgd2000-and-local-vertical-datums">on the LINZ website</a>.</p>
From: <a href="https://data.linz.govt.nz/group/ngo/" title="Profile for National Geodetic Office">National Geodetic Office</a><br />
Added: 25 Jul 2016<br />
Updated: 03 Aug 2016<br />
Taranaki 1970 to NZGD2000 Conversiontag:data.linz.govt.nz,2016-07:layers:534432016-07-25T21:05:36.238376+00:002016-08-02T21:40:42.277514+00:00
<a class="kxThumbnail" href="https://data.linz.govt.nz/layer/53443-taranaki-1970-to-nzgd2000-conversion/" title="Details for Taranaki 1970 to NZGD2000 Conversion"><img src="//tiles-cdn.koordinates.com/services/tiles/v4/thumbnail/layer=53443.156572,style=auto/90x70.png" alt="Taranaki 1970 to NZGD2000 Conversion thumbnail"/></a><br />
<br /><strong>Updated with new data on 02 Aug 2016</strong><br />
<p>The TNK70-NZGD2000 grid enables the conversion of normal-orthometric heights from the Taranaki 1970 local vertical datum directly to New Zealand Geodetic Datum 2000 (NZGD2000) ellipsoidal heights. </p>
<p>TNK70-NZGD2000 is published on a one arc-minute grid (approximately 1.8 kilometres) extending over the benchmarks that nominally define the extent of the Taranaki 1970 vertical datum (173.6° E to 176.4° E, 38.3° S to 41.1° S).<br>
The conversion value is represented by the attribute “delta”, in metres. </p>
<p>This grid is a combination of New Zealand Quasigeoid 2016 <a href="https://data.linz.govt.nz/layer/3418">NZGeoid2016</a> and the <a href="https://data.linz.govt.nz/layer/3444">TNK70-NZVD2016</a> height conversion grid. Where NZGeoid2016 is the reference surface for the New Zealand Vertical Datum 2016 (NZVD2016), while the TNK70-NZVD2016 grid models the difference between the Taranaki 1970 vertical datum and NZVD2016 using the LINZ GPS-levelling marks. </p>
<p>More information on converting heights between vertical datums can be found <a href="http://www.linz.govt.nz/data/geodetic-services/coordinate-conversion/converting-between-nzvd2016-nzgd2000-and-local-vertical-datums">on the LINZ website</a>.</p>
From: <a href="https://data.linz.govt.nz/group/ngo/" title="Profile for National Geodetic Office">National Geodetic Office</a><br />
Added: 25 Jul 2016<br />
Updated: 02 Aug 2016<br />
Napier 1962 to NZGD2000 Conversiontag:data.linz.govt.nz,2016-07:layers:534352016-07-25T20:54:23.379963+00:002016-08-02T21:35:21.412131+00:00
<a class="kxThumbnail" href="https://data.linz.govt.nz/layer/53435-napier-1962-to-nzgd2000-conversion/" title="Details for Napier 1962 to NZGD2000 Conversion"><img src="//tiles-cdn.koordinates.com/services/tiles/v4/thumbnail/layer=53435.156564,style=auto/90x70.png" alt="Napier 1962 to NZGD2000 Conversion thumbnail"/></a><br />
<br /><strong>Updated with new data on 02 Aug 2016</strong><br />
<p>The NPR62-NZGD2000 grid enables the conversion of normal-orthometric heights from the Napier 162 ocal vertical datum directly to New Zealand Geodetic Datum 2000 (NZGD2000) ellipsoidal heights. </p>
<p>NPR62-NZGD2000 is published on a one arc-minute grid (approximately 1.8 kilometres) extending over the benchmarks that nominally define the extent of the Napier 1962 vertical datum (175.6° E to 177.9° E, 38.6° S to 40.6° S). </p>
<p>The conversion value is represented by the attribute “delta”, in metres. </p>
<p>This grid is a combination of New Zealand Quasigeoid 2016 <a href="https://data.linz.govt.nz/layer/3418">NZGeoid2016</a> and the <a href="https://data.linz.govt.nz/layer/3436">NPR62-NZVD2016</a> height conversion grid. Where NZGeoid2016 is the reference surface for the New Zealand Vertical Datum 2016 (NZVD2016), while the NPR62-NZVD2016 grid models the difference between the Napier 1962 vertical datum and NZVD2016 using the LINZ GPS-levelling marks. </p>
<p>More information on converting heights between vertical datums can be found <a href="http://www.linz.govt.nz/data/geodetic-services/coordinate-conversion/converting-between-nzvd2016-nzgd2000-and-local-vertical-datums">on the LINZ website</a>.</p>
From: <a href="https://data.linz.govt.nz/group/ngo/" title="Profile for National Geodetic Office">National Geodetic Office</a><br />
Added: 25 Jul 2016<br />
Updated: 02 Aug 2016<br />
NZ Height Conversion Indextag:data.linz.govt.nz,2016-07:layers:534192016-07-20T21:43:17.371649+00:002016-08-02T21:46:05.283970+00:00
<a class="kxThumbnail" href="https://data.linz.govt.nz/layer/53419-nz-height-conversion-index/" title="Details for NZ Height Conversion Index"><img src="//tiles-cdn.koordinates.com/services/tiles/v4/thumbnail/layer=53419.156576,style=auto/90x70.png" alt="NZ Height Conversion Index thumbnail"/></a><br />
<br /><strong>Updated with new data on 02 Aug 2016</strong><br />
<p>This index enables users to identify the extent of the relationship grids provided on LDS, which are used to convert heights provided in terms of one of 13 historic local vertical datums to NZVD2016. </p>
<p>The polygons comprising the index show the extent of the conversion grids. </p>
<p>Users can view the following polygon attributes:<br>
Shape_VDR: Vertical Datum Relationship grid area<br>
LVD: Local Vertical Datum<br>
Control: Number of control marks used to compute the relationship grid<br>
Mean: Mean vertical datum relationship value at control points<br>
Std: Standard deviation of vertical datum relationship value at control points<br>
Min: Minimum vertical datum relationship value at control points<br>
Max: Maximum vertical datum relationship value at control points<br>
Range: Range of vertical datum relationship value at control points<br>
Ref: Reference control mark for the local vertical datum<br>
Ref_value: Vertical datum relationship value at the reference mark<br>
Grid: Formal grid id </p>
<p><strong>Users should note that the values represented in this dataset have been calculated with the outliers excluded. These same outliers were excluded during the computation of the relationship grids, but were included when calculating the 95% confidence intervals</strong><br>
More information on converting heights between vertical datums can be found on the <a href="http://www.linz.govt.nz/data/geodetic-services/coordinate-conversion/converting-between-nzvd2016-nzgd2000-and-local-vertical-datums">LINZ website</a>.</p>
From: <a href="https://data.linz.govt.nz/group/ngo/" title="Profile for National Geodetic Office">National Geodetic Office</a><br />
Added: 20 Jul 2016<br />
Updated: 02 Aug 2016<br />
Dunedin-Bluff 1960 to NZGD2000 Conversiontag:data.linz.govt.nz,2016-07:layers:534252016-07-25T20:26:56.893253+00:002016-08-02T21:21:02.848769+00:00
<a class="kxThumbnail" href="https://data.linz.govt.nz/layer/53425-dunedin-bluff-1960-to-nzgd2000-conversion/" title="Details for Dunedin-Bluff 1960 to NZGD2000 Conversion"><img src="//tiles-cdn.koordinates.com/services/tiles/v4/thumbnail/layer=53425.156554,style=auto/90x70.png" alt="Dunedin-Bluff 1960 to NZGD2000 Conversion thumbnail"/></a><br />
<br /><strong>Updated with new data on 02 Aug 2016</strong><br />
<p>The DBL60-NZGD2000 grid enables the conversion of normal-orthometric heights from the Dunedin-Bluff 1960 local vertical datum directly to New Zealand Geodetic Datum 2000 (NZGD2000) ellipsoidal heights. </p>
<p>DBL60-NZGD2000 is published on a one arc-minute grid (approximately 1.8 kilometres) extending over the benchmarks that nominally define the extent of the Dunedin-Bluff 1960 vertical datum (167.4° E to 169.9° E, 45.0° S to 46.7° S). </p>
<p>The conversion value is represented by the attribute “delta”, in metres. </p>
<p>This grid is a combination of New Zealand Quasigeoid 2016 <a href="https://data.linz.govt.nz/layer/3418">NZGeoid2016</a> and the <a href="https://data.linz.govt.nz/layer/3426">DBL60-NZVD2016</a> height conversion grid. Where NZGeoid2016 is the reference surface for the New Zealand Vertical Datum 2016 (NZVD2016), while the DBL60-NZVD2016 grid models the difference between the Dunedin-Bluff 1960 vertical datum and NZVD2016 using the LINZ GPS-levelling marks. </p>
<p>More information on converting heights between vertical datums can be found <a href="http://www.linz.govt.nz/data/geodetic-services/coordinate-conversion/converting-between-nzvd2016-nzgd2000-and-local-vertical-datums">on the LINZ website</a>.</p>
From: <a href="https://data.linz.govt.nz/group/ngo/" title="Profile for National Geodetic Office">National Geodetic Office</a><br />
Added: 25 Jul 2016<br />
Updated: 02 Aug 2016<br />
NZGD2000 deformation model version 2013-08-01 reverse patch coordinate shifts contourstag:data.linz.govt.nz,2013-06:layers:516842013-06-07T03:06:01.158804+00:002013-06-14T01:34:13.649873+00:00
<a class="kxThumbnail" href="https://data.linz.govt.nz/layer/51684-nzgd2000-deformation-model-version-2013-08-01-reverse-patch-coordinate-shifts-contours/" title="Details for NZGD2000 deformation model version 2013-08-01 reverse patch coordinate shifts contours"><img src="//tiles-cdn.koordinates.com/services/tiles/v4/thumbnail/layer=51684.132338,style=auto/90x70.png" alt="NZGD2000 deformation model version 2013-08-01 reverse patch coordinate shifts contours thumbnail"/></a><br />
<br /><strong>Updated with new data on 14 Jun 2013</strong><br />
<p>The deformation model associated with the NZGD2000 datum was updated, nominally at 1 August 2013. The actual update of LINZ data took place on 14-15 December 2013. This update involved reverse patches, which means that the "reference coordinates" of features were updated. The main updates relate to the Christchurch earthquakes. The patch also updated coordinates affected by other South Island earthquakes since 2000.</p>
<p>These updates have been incorporated into Landonline and resulted in spatial updates to all features in the affected areas.</p>
<p>This data set contains contours indicating the extent and magnitude of the coordinate changes to assist in assessing the impact of this update on client data sets. This dataset is also available as a <a href="http://data.linz.govt.nz/#/layer/1685-nzgd2000-deformation-model-version-2013-08-01-reverse-patch-coordinate-shifts-filled-contours/">multipolygon</a>.</p>
<p>For more information see <a href="http://www.landonline.govt.nz/landonline-system-updates/south-island-coordinate-update">here</a></p>
From: <a href="https://data.linz.govt.nz/group/ngo/" title="Profile for National Geodetic Office">National Geodetic Office</a><br />
Added: 07 Jun 2013<br />
Updated: 14 Jun 2013<br />
Gisborne 1926 to NZGD2000 Conversiontag:data.linz.govt.nz,2016-07:layers:534292016-07-25T20:31:00.093075+00:002016-08-02T21:23:26.805423+00:00
<a class="kxThumbnail" href="https://data.linz.govt.nz/layer/53429-gisborne-1926-to-nzgd2000-conversion/" title="Details for Gisborne 1926 to NZGD2000 Conversion"><img src="//tiles-cdn.koordinates.com/services/tiles/v4/thumbnail/layer=53429.156558,style=auto/90x70.png" alt="Gisborne 1926 to NZGD2000 Conversion thumbnail"/></a><br />
<br /><strong>Updated with new data on 02 Aug 2016</strong><br />
<p>The GSB26-NZGD2000 grid enables the conversion of normal-orthometric heights from the Gisborne 1926 local vertical datum directly to New Zealand Geodetic Datum 2000 (NZGD2000) ellipsoidal heights. </p>
<p>GSB26-NZGD2000 is published on a one arc-minute grid (approximately 1.8 kilometres) extending over the benchmarks that nominally define the extent of the Gisborne 1926 vertical datum (177.0° E to 178.6° E, 37.4° S to 39.0° S). </p>
<p>The conversion value is represented by the attribute “delta”, in metres. </p>
<p>This grid is a combination of New Zealand Quasigeoid 2016 <a href="https://data.linz.govt.nz/layer/3418">NZGeoid2016</a> and the <a href="https://data.linz.govt.nz/layer/3430">GSB26-NZVD2016</a> height conversion grid. Where NZGeoid2016 is the reference surface for the New Zealand Vertical Datum 2016 (NZVD2016), while the GSB26-NZVD2016 grid models the difference between the Gisborne 1926 vertical datum and NZVD2016 using the LINZ GPS-levelling marks. </p>
<p>More information on converting heights between vertical datums can be found <a href="http://www.linz.govt.nz/data/geodetic-services/coordinate-conversion/converting-between-nzvd2016-nzgd2000-and-local-vertical-datums">on the LINZ website</a>.</p>
From: <a href="https://data.linz.govt.nz/group/ngo/" title="Profile for National Geodetic Office">National Geodetic Office</a><br />
Added: 25 Jul 2016<br />
Updated: 02 Aug 2016<br />