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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 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.

Simple

Identification info

Date (Creation)
2011-04
Purpose

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 .

Status
On going
Point of contact
Role Organisation Electronic mail address
Point of contact

LINZ - Land Information New Zealand

info@linz.govt.nz

Spatial representation type
Vector
Topic category
  • Geoscientific information

Extent

N
S
E
W


Maintenance and update frequency
Weekly

Resource format

Title

*.xml

Date
Edition

Unknown

ANZLIC Jurisdictions
  • New Zealand

Resource constraints

Classification
Unclassified

Resource constraints

Use limitation

Crown copyright reserved

Use constraints
Copyright

Resource constraints

Use limitation

Released under Creative Commons By 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 Land Information New Zealand should be used:

'CC-By 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 Land Information New Zealand should be used:

‘Contains data sourced from Land Information New Zealand under CC-By.'


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.

Use constraints
License
Language
English
Character encoding
UTF8

Distribution Information

OnLine resource

https://data.linz.govt.nz/layer/50786-nz-survey-control-networks/

Resource lineage

Statement

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.

Hierarchy level
Dataset
Other

dataset

Reference System Information

Reference system identifier
urn:ogc:def:crs:EPSG::4167

Metadata constraints

Classification
Unclassified

Metadata constraints

Use limitation

Crown copyright reserved

Use constraints
Copyright

Metadata constraints

Use limitation

Released under Creative Commons By

Use constraints
License

Metadata

Metadata identifier
464a3003-e762-0a7c-7629-ae4bb43275b1

Language
English
Character encoding
UTF8
Contact
Role Organisation Electronic mail address
Resource provider

LINZ - Land Information New Zealand

info@linz.govt.nz

Type of resource

Resource type
Dataset
Name

dataset

Date info (Revision)
2012-01-28

Metadata standard

Title

ANZLIC Metadata Profile: An Australian/New Zealand Profile of AS/NZS ISO 19115:2005, Geographic information - Metadata

Edition

1.1

 
 

Spatial extent

N
S
E
W


Keywords

ANZLIC Jurisdictions
New Zealand

Provided by

Access to the catalogue
Read here the full details and access to the data.


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