AGRS Tools, Models and Resources

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The Australian Geospatial Reference System is managed by the Intergovernmental Committee on Surveying and Mappings’ Permanent Committee on Geodesy.


Tools

Transform between GDA94 and GDA2020

Transform geographic coordinates between GDA94 and GDA2020 using the 7-parameter similarity transformation. The transformations are only valid inside the legal extents of GDA2020. 1

Transform between MGA94 and MGA2020

Transform map grid eastings and northings between MGA94 and MGA2020. The transformations are only valid inside the legal extents of GDA2020.

Propagate between GDA2020 and ATRF2014

Propagate static GDA2020 coordinates to time dependent ATRF2014 coordinates and vice versa. The transformations are only valid inside the legal extents of GDA2020.

AUSGeoid2020

Convert heights between the GDA2020 ellipsoid and AHD using the AUSGeoid2020 model. The conversions are only valid onshore in Australia. Please note, only GDA2020 coordinates can be used with AUSGeoid2020.

AUSGeoid09/AUSGeoid98

Convert heights between the GDA94 ellipsoid and AHD using either the AUSGeoid09 model or AUSGeoid98 model. The conversions are only valid onshore in Australia. Please note, only GDA94 coordinates can be used with AUSGeoid09 or AUSGeoid98.

Australian Vertical Working Surface

Convert heights between the GDA2020 ellipsoidal and AVWS using the Australian Gravimetric Quasi-geoid model. The conversions are only valid for latitudes and longitudes between 8(S) to 61(S) and 93(E) to 174(E).

Conversion between geographic and grid coordinates

Use Krueger's n-series formulae to project between a latitude and a longitude (geographic coordinates) to an easting, northing, and zone (grid coordinates), and vice versa. Note: Krueger's n-series formulae are more accurate versions of Redfearn's formulae.

Vincenty's Formulae (inverse and direct)

Given a coordinate, an ellipsoidal distance, and a geodetic azimuth, use Vincenty's direct formula to calculate the coordinate of a second point. Given two coordinates, use Vincenty's inverse formula to calculate an ellipsoidal distance and a geodetic azimuth between the two points.

As the Cocky Flies

Use the Gazetteer of Australia to obtain the coordinates for two geographical locations and calculate the distance between them.

These apps rely on GeodePy, the Python geodesy package developed by Geoscience Australia. If you would like to include calls to these apps in your own software, API can be found here.


1 Transform between GDA94 and GDA2020. The old 'proof of concept' app can be found here.


2 AUSGeoid09 (binary file). The AUSGeoid98 model can be downloaded from here.