The Geocentric Datum of Australia 1994 (GDA94) is a geodetic datum covering the Australian continent. Details of this datum are provided by the GDA94 Technical Manual. [1]

The Geocentric Datum of Australia (GDA94) was the official geodetic datum before GDA2020. It was adopted nationally in January 2000. GDA94 replaced the Australian Geodetic Datum 1966 (AGD66) and Australian Geodetic Datum 1984 (AGD84).

2019年9月17日 · EPSG:4283 Geodetic coordinate system for Australia including Lord Howe Island, Macquarie Island, Ashmore and Cartier Islands, Christmas Island, Cocos (Keeling) Islands, Norfolk Island. All onshore and offshore. Horizontal component of 3D system.

2017年12月14日 · The Geocentric Datum of Australia 1994 (GDA94) was based on the realisation of ITRF1992 at epoch 1994.0, or 1 January 1994. Since then: due to plate tectonic motion, Australia has moved ~7 cm per year. As a result GDA94 coordinates have continued to diverge from ITRF92 coordinates. By 2020, the difference will be approximately 1.8 metres.

The Geocentric Datum of Australia 1994 (GDA94) is based on the International Terrestrial Reference Frame 1992 (ITRF92) positions at 1st January 1994, computed for the eight Australian Fiducial Network (AFN) sites. GDA94 replaces the former Australian Geodetic Datum (AGD) and was developed to be directly compatible with the Global Positioning ...

GDA is GEOCENTRIC - it is a system of coordinates centred at the centre of the earth's mass. GDA94 is compatible with modern positioning techniques such as the Global Positioning System (GPS). It supersedes the existing Australian Geodetic Datum …

Name: GDA94 to WGS 84 (1) Method: Geocentric translations (geog2D domain) Remarks: Approximation at the 3m level assuming WGS 84 is equivalent to GDA94. Ignores the low accuracy of the WGS 84 ensemble and the inconsistent application of tectonic plate motion to WGS 84 data. Information source: OGP. Revision date: 2021-09-23. Unit: metre.

澳大利亚地心基准（通常称为gda94，或只是gda）是澳大利亚的坐标系。 也就是说，它是纬度和经度的系统，或者是东坐标和北坐标系，我们可以用来跟踪位置。

2021年12月24日 · 1、什么是GDA94?澳大利亚地心基准（通常称为 GDA94 ,或只是GDA）是澳大利亚的坐标系。 也就是说，它是 纬度和经度的系统，或者是东坐标和北坐标系，我们可以用来跟踪位置。 GDA是地心的，它是以地球质量为中心的坐标系。 所有澳大利亚政府、州、领土和联邦同意在 2000/2001期间采用GDA1994基准。 这包括改变法规和条例，这些法规和条例确定了政府和社区之间许多 交易所使用的数据，例如采矿地产、大量地图、各种信息的报告。 正是这种 …

Remarks: Approximation at the 3m level assuming WGS 84 is equivalent to GDA94. Ignores the low accuracy of the WGS 84 ensemble and the inconsistent application of tectonic plate motion to WGS 84 data. Information source: OGP. Revision date: 2021-09-23. Unit: metre. Geodetic CRS: GDA94. Datum: Geocentric Datum of Australia 1994. Ellipsoid: GRS 1980.