Antarctic Ant50k Maps

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Creative Commons Attribution 4.0 International

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You must attribute the creator in your own works.

4340
307
Updated
08 Dec 2014

This dataset was last updated on LINZ Data Service on 08 Dec 2014.

The Ant50 map series provides topographic mapping within the Ross Dependency, Antarctica

Digital images of the maps are also publicly available from www.linz.govt.nz/topography/topo-maps/antarctic-to...

Georeferenced raster digital images are provided at a resolution of 300 DPI. Georeferencing allows adjacent maps to be accurately and automatically aligned within GIS systems.

For more information, and a description of the georeferencing keys:
www.linz.govt.nz/topography/topo-maps/topo50/digit...

Layer ID 51109
Data type Image/Raster
Resolution 4.233m
Services Web Map Service (WMS), Catalog Service (CS-W), data.govt.nz Atom Feed

Antarctic Geodetic Marks

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Creative Commons Attribution 4.0 International

You may use this work for commercial purposes.

You must attribute the creator in your own works.

2530
68
Updated
17 Mar 2019

This dataset was last updated on LINZ Data Service on 17 Mar 2019.

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.

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.

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.

Accuracy

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.

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 www.linz.govt.nz/geodetic/datums-projections-heigh...

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.

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.

Layer ID 50789
Data type Vector point
Feature count 468
Primary key id
Services Vector Query API, Web Feature Service (WFS), Catalog Service (CS-W), data.govt.nz Atom Feed

Antarctic Geodetic Vertical Marks

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Creative Commons Attribution 4.0 International

You may use this work for commercial purposes.

You must attribute the creator in your own works.

2212
46
Updated
17 Mar 2019

This dataset was last updated on LINZ Data Service on 17 Mar 2019.

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 www.linz.govt.nz/geodetic/datums-projections-heigh....

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.

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.

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.

Accuracy

The accuracy of normal-orthometric heights are described by height orders.

For more information see www.linz.govt.nz/geodetic/datums-projections-heigh....

Note the accuracy applies at the time the mark was last surveyed - see the geodetic database for historical information about height coordinates.

Layer ID 50788
Data type Vector point
Feature count 279
Primary key id
Services Vector Query API, Web Feature Service (WFS), Catalog Service (CS-W), data.govt.nz Atom Feed

NZ Ross Dependency Contours (ANT, 1:50k)

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Creative Commons Attribution 4.0 International

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You must attribute the creator in your own works.

2068
106
Updated
04 Dec 2014

This dataset was last updated on LINZ Data Service on 04 Dec 2014.

An imaginary line that connects points of equal height value eg the elevation of the land surface above or below a vertical datum, in this case of LINZ topographic mapping, this is Mean Sea Level.

Data Dictionary for contour: apps.linz.govt.nz/topo-data-dictionary/index.aspx?...

This layer is a component of the Ant50 map series. This is the topographic mapping carried out at 1:50,000 scale by LINZ within the Ross Dependency, Antarctica.

Layer ID 51155
Data type Vector linestring
Feature count 12670
Elevation Z (elevation)
Services Vector Query API, Web Feature Service (WFS), Catalog Service (CS-W), data.govt.nz Atom Feed

NZ Ross Dependency ANT 50 Map Sheet

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Creative Commons Attribution 4.0 International

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You must attribute the creator in your own works.

2062
101
Updated
04 Dec 2014

This dataset was last updated on LINZ Data Service on 04 Dec 2014.

Polygon for each Topo50 map sheet in the Ross Dependency, Antarctic holding extents of each sheet, it's sheet code, name, edition, and revision statement. This is the same information that is printed on each ANTTopo50 map.

Layer ID 51197
Data type Vector polygon
Feature count 108
Services Vector Query API, Web Feature Service (WFS), Catalog Service (CS-W), data.govt.nz Atom Feed

NZ Ross Dependency Descriptive Texts (ANT, 1:50k)

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Creative Commons Attribution 4.0 International

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You must attribute the creator in your own works.

2046
58
Updated
04 Dec 2014

This dataset was last updated on LINZ Data Service on 04 Dec 2014.

Descriptive text; object used to hold text.

Data Dictionary for descriptive_text: apps.linz.govt.nz/topo-data-dictionary/index.aspx?...

This layer is a component of the Ant50 map series. This is the topographic mapping carried out at 1:50,000 scale by LINZ within the Ross Dependency, Antarctica.

Layer ID 51188
Data type Vector point
Feature count 103
Services Vector Query API, Web Feature Service (WFS), Catalog Service (CS-W), data.govt.nz Atom Feed

NZ Ross Dependency Coastlines (ANT, 1:50k)

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Creative Commons Attribution 4.0 International

You may use this work for commercial purposes.

You must attribute the creator in your own works.

1834
106
Updated
04 Dec 2014

This dataset was last updated on LINZ Data Service on 04 Dec 2014.

The line forming the boundary between the land and sea, defined by mean high water.

Data Dictionary for coastline: apps.linz.govt.nz/topo-data-dictionary/index.aspx?...

This layer is a component of the Ant50 map series. This is the topographic mapping carried out at 1:50,000 scale by LINZ within the Ross Dependency, Antarctica.

Layer ID 51160
Data type Vector linestring
Feature count 15
Services Vector Query API, Web Feature Service (WFS), Catalog Service (CS-W), data.govt.nz Atom Feed

Antarctic Bathymetric Data Index

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Creative Commons Attribution 4.0 International

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You must attribute the creator in your own works.

1794
13
Updated
21 Nov 2016

This dataset was last updated on LINZ Data Service on 21 Nov 2016.

This index enables you to identify the freely available bathymetric data held and used by LINZ on its Antarctic (Ross Dependency) coastal nautical charts. Some of our data holdings date back to the 1960s. The polygons comprising the index show the extent of the survey datasets. The attributes attached to each polygon will enable you to view, amongst other attributes, the age and quality of the bathymetric data.

Please refer to the LINZ Bathymetric Index Data Dictionary for further information about the attributes of this dataset.

The bathymetric data is not downloadable from the LINZ Data Service. Datasets prior to the year 2000 are predominantly available only as georeferenced TIFF images of the original hard copy sounding sheets. Data post-2000 is often available as both georeferenced TIFF images and as digital data files (vector data in plain text format).

Requests for the bathymetric data should be sent to customersupport@linz.govt.nz with “Hydro Bathy Data” in the subject line. Requests must, as a minimum, specify the id, chart_no and serial_no as shown in the attributes attached to each polygon representing the datasets of interest.

Layer ID 53409
Data type Vector polygon
Feature count 49
Primary key id
Services Vector Query API, Web Feature Service (WFS), Catalog Service (CS-W), data.govt.nz Atom Feed

NZ Ross Dependency Geographic Names (ANT, 1:50k)

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Creative Commons Attribution 4.0 International

You may use this work for commercial purposes.

You must attribute the creator in your own works.

1706
92
Updated
17 Jun 2015

This dataset was last updated on LINZ Data Service on 17 Jun 2015.

Geographic name holds the proper noun of certain objects within the Topo databases. Geographic_name does not apply to roads, railway lines, or descriptive text - eg 'Brunner Mine' would be a Geographic_name but 'mine disused' is held in the descriptive_text feature

Data Dictionary for geographic_name: apps.linz.govt.nz/topo-data-dictionary/index.aspx?...

This layer is a component of the Ant50 map series. This is the topographic mapping carried out at 1:50,000 scale by LINZ within the Ross Dependency, Antarctica.

Layer ID 51167
Data type Vector point
Feature count 2011
Services Vector Query API, Web Feature Service (WFS), Catalog Service (CS-W), data.govt.nz Atom Feed

NZ Ross Dependency Ice Shelf Polygons (ANT, 1:50k)

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Creative Commons Attribution 4.0 International

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You must attribute the creator in your own works.

1658
52
Updated
04 Dec 2014

This dataset was last updated on LINZ Data Service on 04 Dec 2014.

Large area of permanent sea ice.

Data Dictionary for ice_shelf_poly: apps.linz.govt.nz/topo-data-dictionary/index.aspx?...

This layer is a component of the Ant50 map series. This is the topographic mapping carried out at 1:50,000 scale by LINZ within the Ross Dependency, Antarctica.

Layer ID 51189
Data type Vector polygon
Feature count 1
Services Vector Query API, Web Feature Service (WFS), Catalog Service (CS-W), data.govt.nz Atom Feed
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