Map projection options
for ACRES optical image products

When ordering products from ACRES, customers need to choose a map projection and datum. The three main projections available are listed below. For the first two projections, customers may choose their desired datum (GDA94 is the default). For Lambert Conformal Conic Projections, the datum is fixed, as described below.

[back to top]

Universal Transverse Mercator (UTM) projection

The UTM Projection is the default for all ACRES orders and can be based on the following datums:

AMG66

Australian Map Grid 1966 is a UTM projection of coordinates based on the Australian Geodetic Datum 1966 (AGD66). The Australian National Spheroid (ANS) is the spheroid model of the earth that is used to define AGD66.

MGA94

Map Grid of Australia 1994 is a UTM projection of coordinates based on the Geodetic Datum of Australia 1994 (GDA94). The Geodetic Reference System 1980 (GRS80) is the spheroid model of the earth that is used to define GDA94.

WGS84

A UTM projection of coordinates based on the World Geodetic System 1984 (WGS84) datum. The parameters of the WGS84 ellipsoid are nearly identical to those for the GRS80 spheroid. More details are available about the difference between GDA94 and WGS84 coordinates on the Geocentric Datum of Australia (GDA) webpage.

[back to top]

Equirectangular projection

Otherwise known as geodetic, geographic, rectangular, plate carre, or unprojected map, the equirectangular projection can be used with any of the available datums, AGD66, GDA94 or WGS84.

[back to top]

Lambert Conformal Conic projection

ACRESLC

Australian Centre for Remote Sensing Lambert Conformal Conic projection (ACRESLC) is based on WGS84. It has parallels at 18 and 36 degrees south with central meridian at 132 degrees east and latitude of the projection origin at 27 degrees south. No false easting or northing are applied to the coordinates.

GALCC

Geoscience Australia Lambert Conformal Conic projection (GALCC) is based on GDA94. It has parallels at 18 and 36 degrees south with central meridian at 134 degrees east and latitude of the projection origin at the equator. No false easting or northing are applied to the coordinates.

[back to top]

More information

Further information is available on Datums and projections on the Geodetic Infrastructure - Datums webpage.