GDA Technical Manual

Version 2.3 - The last update to the Manual was February 2006

Photo: Preparing for the Australian National Network Survey in the
Northern Territory - August 1993

The GDA Technical Manual is now available online

Options For Downloading

• Download the GDA Technical Manual as a PDF file - (849KB)



• Download Transformation grids
  • AGD66 Transformation Grid File (3.2mb)
  • AGD84 Transformation Grid File (7.9mb)
  
  
  
• Download GDA Technical Manual Spreadsheets (360kb)



• Transformation Grid Extraction Tool Link

Links to Transformation Software

• GDAy (QLD)
• GDAit (Vic)
• Datumtran (NSW)
• RapidMap prepared downloadable (ICSM)
• GeoidInterpolation.zip V1.03 December 2011 (0.6 MB)
  Latest version of geoid interpolation program. Requires geoid grid file in either WINTER DAT format or NTv2 gsb format. Offers interactive and file interpolation modes and the ability to create a single NTv2 file from a grid file in the legacy AUSGeoid DAT file format. Software documentation is provided.
  (Users who experience problems running this software for the first time should install the Microsoft Visual C++ 2008 Libraries.)

NOTE: Online versions of Vincenty's and Redfearns Formulae are also available on the Geoscience Australia website. The online calculators provide the same results as the spreadsheets in the Technical Manual.

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