Australian National Network

Map of Australia indicating the locations of Australian Fiducial Network sites in Hobart, Canberra, Townsville, Darwin, Alice Springs, Ceduna, Yarragadee and Karratha and Australian National Network sites in the same locations plus an additional 60 sites scattered throughout the country.

Australian National Network

The Australian National Network (ANN) consists of multiple stations, at approximately 500km intervals across Australia. These sites were observed with Global Navigation Satellite System (GNSS) as part of an Intergovernmental Committee on Surveying and Mapping (ICSM) cooperative project during 1993 (with some additional observations in 1992 and 1994). Red dots show the Australian National Network and the white triangles show the Australian Fiducial Network.

This network of sites is constrained to the Australian Fiducial Network and this forms the framework for the Geocentric Datum of Australia (GDA). It has an estimated accuracy of 0.1ppm.