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Map projections
Listed below are values for the parameters which define map projections and the ellipsoids they refer to. Click on the following links, or simply scroll down to view details of projections relevant to New South Wales.
Current GDA Projections
- MGA - Map Grid of Australia
- MGA zone boundaries across NSW
- GDA Lambert - GDA94 Lambert Projection for NSW
Superseded AGD66 Projections
- ISG - Integrated Survey Grid
- AMG - Australian Map Grid
Others
- UTM - Universal Transverse Mercator
- ANG - Australian National Grid (pre 1966)
- Lambert - NSW Mapping Agencies (pre GDA)
Ellipsoids
- GRS80 - Geodetic Reference System 1980
- WGS84 - World Geodetic System 1984
- ANS - Australian National Spheroid
- Clarke 1858
MGA - Map Grid of Australia
The official coordinate projection for use with the Geocentric Datum of Australia 1994 (GDA94).
| Projection: | Transverse Mercator | |
| Zone Width: | 6 degrees | |
| Longitude of Origin: | Central Meridian of each zone | |
| Latitude of Origin: | Equator (zero degrees) | |
| False Easting: | 500 000 | |
| False Northing: | 10 000 000 | |
| Central Scale Factor: | 0.9996 | |
| Units: | Metre | |
| Ellipsoid: | GRS80 | |
| More Information: | Go to ICSM website www.icsm.gov.au/icsm/gda/gdatm/index.html |
MGA Zones for NSW
GDA Lambert - GDA94 Lambert Projection for NSW
This Lambert projection is suitable for state-wide GIS data in NSW. To ensure uniformity across agencies, the Surveyor General has endorsed the following parameters for use with GDA94 data.
| Projection: | Conformal Conic | |
| Standard Parallels: | -30º 45' 00" | |
| -35º 45' 00" | ||
| Latitude of Origin: | -33º 15' 00" | |
| Central Meridian: | 147º 00' 00" | |
| False Easting: | 9 300 000 | |
| False Northing: | 4 500 000 | |
| Units: | Metre | |
| Ellipsoid: | GRS80 | |
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More Information: Projection Files:
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Lands Policy (PDF 3.6 mb) GDA 1994 Lambert_CC.prj (TEXT 0.8 kb) GDA 1994 Lamberts_CC.xml (XML 5.2 kb) |
ISG - Integrated Survey Grid
A projection used in NSW only - ISG was introduced to minimise scale factor corrections (mainly in cadastral surveys). Coordinates are derived from the Australian Geodetic Datum 1966 (AGD66) at www.ga.gov.au/geodesy/datums/agd.jsp
| Projection: | Transverse Mercator | |
| Zone Width: | 2 degrees | |
| Longitude of Origin: | Central Meridian of each zone | |
| Latitude of Origin: | Equator (zero degrees) | |
| False Easting: | 300 000 | |
| False Northing: | 5 000 000 | |
| Central Scale Factor: | 0.99994 | |
| Units: | Metre | |
| Ellipsoid: | ANS | |
| More Information: | ISG document (PDF 220.1 kb ) |
AMG - Australian Map Grid
The official coordinate projection used with the Australian Geodetic Datum 1966 (AGD66) at www.ga.gov.au/geodesy/datums/agd.jsp
| Projection: | Transverse Mercator | |
| Zone Width: | 6degrees | |
| Longitude of Origin: | Central Meridian of each zone | |
| Latitude of Origin: | Equator (zero degrees) | |
| False Easting: | 500 000 | |
| False Northing: | 10 000 000 | |
| Central Scale Factor: | 0.9996 | |
| Units: | Metre | |
| Ellipsoid: | ANS | |
| More Information: | www.ga.gov.au/geodesy/datums/amg.jsp |
UTM - Universal Transverse Mercator
The standard international coordinate projection system used with many different map datums. (The parameters are identical to MGA, therefore users often select UTM where MGA may not be an available option in their software or GPS receiver setup menu).
| Projection: | Transverse Mercator | |
| Zone Width: | 6 degrees | |
| Longitude of Origin: | Central Meridian of each zone | |
| Latitude of Origin: | Equator (zero degrees) | |
| False Easting: | 500 000 | |
| False Northing: | 10 000 000 | |
| Central Scale Factor: | 0.9996 | |
| Units: | Metre | |
| Ellipsoid: | Global - WGS84, GRS80 etc... | |
| More Information: | www.uwgb.edu/dutchs/FieldMethods/UTMSystem.htm |
ANG - Australian National Grid
Australia's grid coordinate system prior to 1966.
| Projection: | Transverse Mercator | |
| Zone Width: | 5 degrees | |
| Longitude of Origin: | Central Meridian of each zone | |
| Latitude of Origin: | Equator (zero degrees) | |
| False Easting: | 400 000 | |
| False Northing: | 4 915 813.467 | |
| Central Scale Factor: | 1.0 exactly | |
| Units: | Yards | |
| Ellipsoid: | Clarke 1858 | |
| More Information: | www.ga.gov.au/geodesy/datums/ang.jsp |
Lambert - NSW Mapping Agencies (pre GDA)
This Lambert projection was used by many NSW mapping agencies (primarily CMA) for state-wide hard copy maps based on the Australian Geodetic Datum 1966 see www.ga.gov.au/geodesy/datums/agd.jsp
| Projection: | Conformal Conic | |
| Standard Parallels: | -29º 30' 00" | |
| -35º 30' 00" | ||
| Latitude of Origin: | -32º 30' 00" | |
| Central Meridian: | 147º 00' 00" | |
| False Easting: | n/a | |
| False Northing: | n/a | |
| Units: | Metre | |
| Ellipsoid: | ANS | |
GRS80 - Geodetic Reference System 1980
| Semi-major axis: | 6378137.0 metres | |
| Inverse flattening (1/f): | 298.257222101 | |
| More Information: | www.ga.gov.au/geodesy/datums/ellipsds.jsp |
WGS84 - World Geodetic System 1984
| Semi-major axis: | 6378137.0 metres | |
| Inverse flattening (1/f): | 298.257223563 | |
| More Information: | www.ga.gov.au/geodesy/datums/wgs.jsp |
ANS - Australian National Spheroid
| Semi-major axis: | 6378160.0 metres | |
| Inverse flattening (1/f): | 298.25 | |
| More Information: | www.ga.gov.au/geodesy/datums/ellipsds.jsp |
Clarke 1858 Spheroid
| Semi-major axis: | 20 926 348 British Feet | |
| Inverse flattening (1/f): | 294.26 | |
| More Information: | www.ga.gov.au/geodesy/datums/history.jsp |
