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This dataset was last updated on LINZ Data Service on 03 Feb 2023.
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eng
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Toitū Te Whenua Land Information New Zealand
04 4600110
155 The Terrace
Wellington
6011
New Zealand
customersupport@linz.govt.nz
resourceProvider
2012-01-28
ANZLIC Metadata Profile: An Australian/New Zealand Profile of AS/NZS ISO 19115:2005, Geographic information - Metadata
1.1
urn:ogc:def:crs:EPSG::4167
NZ Survey Control Networks
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).
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.
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.
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:
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
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 http://www.linz.govt.nz/geodetic/geodetic-programme/survey-control-networks/.
Accuracy
============
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.
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 http://www.linz.govt.nz/geodetic/datums-projections-heights/heights/coordinate-orders/
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 or a maintenance contractor.
This simplified geodetic network mark dataset has been created for easy viewing and downloading for the LDS. It only contains New Zealand Geodetic Datum 2000 (NZGD2000) positions. If vertical information is required please use the Geodetic Vertical Mark Data (Simple).
More detailed data such as site photos or coordinate system position data is required please use the full geodetic datasets or directly refer to the web geodetic database at http://www.linz.govt.nz/gdb.
onGoing
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Toitū Te Whenua Land Information New Zealand
Chief Geodesist - National Geodetic Office
+64 4 460 0110
155 The Terrace
Wellington
6011
New Zealand
customersupport@linz.govt.nz
pointOfContact
weekly
*.xml
Unknown
New Zealand
theme
ANZLIC Jurisdictions
Version 2.1
2008-10-29
http://asdd.ga.gov.au/asdd/profileinfo/anzlic-jurisdic.xml#anzlic-jurisdic
ANZLIC the Spatial Information Council
custodian
unclassified
Crown copyright reserved
copyright
Released under Creative Commons Attribution 4.0 International with:
Following Disclaimers:
1. This data is made available through the LINZ Data Service and is based on information contained with Landonline (New Zealand's Official Title and Cadastral System)
Following Attribution:
If you publish, distribute or otherwise disseminate this work to the public without adapting it, the following attribution to Toitū Te Whenua Land Information New Zealand should be used:
'CC BY 4.0 Toitū Te Whenua Land Information New Zealand’
If you adapt this work in any way or include it in a collection, and publish, distribute or otherwise disseminate that adaptation or collection to the public, the following attribution to Toitū Te Whenua Land Information New Zealand should be used:
‘Contains data sourced from the LINZ Data Service and licensed for reuse under CC BY 4.0.'
If "attribution stacking" problems exist then the requirement to display the above attribution statements is waived and in lieu the attribution statement is to be made in any terms or conditions associated with the work/ product/ application/ etc.
license
vector
eng
utf8
geoscientificInformation
https://data.linz.govt.nz/layer/50786-nz-survey-control-networks/
dataset
dataset
The original data comes from a geodetic database which was managed by LINZ and its predecessors.
This database contained a summary of the mark, coordinate and site information derived from survey observations and field sheets. The database was migrated into Landonline in 2000.
unclassified
Crown copyright reserved
copyright
Released under Creative Commons Attribution 4.0 International
license