GIS Tools

 

Convert Geographic coordinates to MGA

• Convert Coordinates
• The Map Grid of Australia
• Technical Details for this Spatial Transformation
• Further Information

Enter the Latitude and Longitude (in decimal degrees) of the point you want to transform:

Latitude DD

Longitude DD

To convert, press this button:

To reset the form, press this button:

This transformation is based upon the Geocentric Datum of Australia (GDA).

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The Map Grid of Australia

The Map Grid of Australia (MGA) is a Universal Transverse Mercator (UTM) projection based on the Geocentric Datum of Australia (GDA). The continent is divided up into zones which have a width of six degrees of longitude.

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Technical Information for this Spatial Transformation

MGA to Geographicals Transformation
Geographicals to MGA Transformation

Script:

The spatial data transformation is performed by a Perl script which has parameters passed to it via the forms interface.

Mathematics:

The transformation algorithm makes use of Redfearn's rigorous formulae as published in the Geocentric Datum of Australia Technical Manual version 1.0 . It uses the Geocentric Datum of Australia (GDA) as its reference.

Spatial Accuracy:

Depending upon the precision of the entered coordinates, this transformation will compute results to the nearest 4mm (nominal) on the ground.

Future Enhancements:

To cater for Geographicals in both Decimal Degrees (DD) and also Degrees, Minutes and Seconds (DMS). Also to possibly cater for transformations based on other spheroids.

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Further Information

For further information contact:
Scientific Coordinator
Spatial Science
info@erin.gov.au