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Chatham Islands Geodetic Datum 1979 (CIGD1979) was previously used to define positions on the Chatham Islands. New Zealand Geodetic Datum 2000 (NZGD2000) is now the official datum used in the Chatham Islands, superseding CIG1979 from March 1998.

Chatham Islands Geodetic Datum 1971 (CIGD1971) was previously used to define positions on the Chatham Islands. It was replaced in 1981 by Chatham Islands Geodetic Datum 1979 (CIGD1979), and both were superseded by New Zealand Geodetic Datum 2000 (NZGD2000) from March 1998.

The mathematical parameters and equations used to convert geodetic datum coordinates to and from a Lambert conformal conic projection.

Find specifications, templates and guidelines for submitting geodetic data to Toitū Te Whenua.

New Zealand’s gravity networks measure variations in Earth’s gravitational field across the country. This supports scientific research, geodetic surveying, and enhances our understanding of Aotearoa’s dynamic geophysical environment.

Coordinate transformations between the International Terrestrial Reference Frame (ITRF) and New Zealand Geodetic Datum 2000 (NZGD2000).

SinoGNSS G100

The SinoGNSS G100 receiver can be configured with the Compass Receiver Utility software.

On Sunday 14 January 2018, LINZ updated the coordinates in Landonline of the large area affected by the Kaikoura earthquake.

Read and download specifications, standards, guidelines, and published documents. These resources are useful for students, researchers, geodetic service contractors and professionals who use New Zealand's geodetic network.

A lot of technical terms are used in New Zealand’s geodetic system. Find out about geodetic and vertical datums, geoids, projections, and coordinate transformations for accurate position and height measurements.

Determination of MHWS

There is no definitive method for establishing mean high-water springs (MHWS) boundaries – it requires a tailored approach that considers factors like hydraulic gradient, land type and the survey accuracy that is required.

Vertical datum relationship grids are reference surfaces that can be used to transform heights between the 13 official local vertical datums and New Zealand Vertical Datum 2016 (NZVD2016).

New Zealand Geodetic Datum 2000 (NZGD2000) coordinates include an ellipsoidal height measured using GNSS (global navigation satellite system) observations. Ellipsoidal heights often need to be converted to a vertical datum.

The Darwin Glacier Lambert Conformal 2000 projection (DGLC2000) was replaced by the McMurdo Sound Lambert Conformal 2000 projection (MSLC2000) on 21 March 2011.

New Zealand Geodetic Datum 1949 (NZGD1949) was a horizontal datum. Its coordinates were classified into orders according to observation type and survey network.

Before May 2010, normal-orthometric heights were categorised using orders based on observation method and survey significance. This order framework was replaced by the Standard for the Geospatial Accuracy Framework (LINZS25005) and Standard for Tiers, Classes and Orders of LINZ Data (LINZS25006), and has been adopted for New Zealand Vertical Datum 2016. The old framework continues to be used for the existing local vertical datum.

The New Zealand Geodetic Datum 2000 (NZGD2000) deformation model is used to adjust coordinates for ongoing crustal deformation. It takes into account tectonic motion and some major earthquakes to ensure that coordinates of survey marks and other features track the movement of those marks over time.

An important feature of a geodetic datum is the reference surface. The reference surface approximates the shape of the Earth, so that geodetic coordinates can be located on a curved surface. The most common reference surface for geodetic datums is an ellipsoid.

The mathematical parameters and equations used to convert New Zealand Map Grid coordinates to other datums and projections.

Coordinates can be transformed between projections within the same datum, or between projections using different datums.

How to transform heights between vertical datums.

Coordinates can be transformed between geodetic datums by using either a transformation grid or a similarity transformation. This section includes examples of transforming to and from New Zealand Geodetic Datum 2000 (NZGD2000).

Vertical datum relationship grids allow the transformation of local vertical datum heights to NZVD2016. These transformation grids were calculated by using observation points with both an ellipsoidal and a normal-orthometric height.

Following a major earthquake, there is often an urgent need for geodetic coordinates, particularly heights, to help re-establish critical infrastructure such as stormwater and wastewater systems.

Geoids and quasigeoids are reference surfaces that accurately represent the Earth’s shape and gravitational field. By collecting gravity data (which differs with latitude, elevation, geology and time), gravity field models are created to compute the geoid, which is then used as reference for a vertical datum.

Landonline has now been updated to reflect the movements that occurred in the four major Christchurch earthquakes and four major Fiordland earthquakes since 2000.

As a consequence of the earthquakes across Canterbury since 2010, geodetic control marks and cadastral marks throughout the region have been subject to varying amounts of movement. Updated Landonline spatial data is available.

Survey-accurate digital cadastre (SDC) status marks in Landonline meet the accuracy standards in relation to the digital position of the marks that surround it.

Calian Smart Antennas

Formerly known as Tallysman Wireless Inc., Calian produces “Smart Antennas” which combine their own Antenna technology with GNSS receiver modules from other vendors.

Eos Positioning Systems receivers can be configured with the Eos Utility software.

MagicUT

The MagicUT receiver can be configured through the device’s Android interface.

Geode GNS1

The Geode GNS1 can be configured with the Geode Connect software, available for Windows, Android and Apple devices.