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Rover Setup

Coordinate System

Choose a coordinate system based on GDA2020 (such as GDA2020 / MGA zone 46) or GDA94 (such as GDA94 / MGA zone 46) datums.

Vertical Datum

Choose one of the available vertical datums:

  • AHD (Tasmania) height
  • AHD height

The following geoids are used to perform the transformation:

  • AUSGeoid09
  • AUSGeoid2020

When using the AHD height vertical datum, a correct geoid file will be selected automatically based on the chosen horizontal system:

  • Projects based on the GDA2020 datum use the AUSGeoid2020 geoid
  • Projects based on the GDA94 datum use the AUSGeoid09 geoid

For the AHD (Tasmania) height vertical datum only AUSGeoid09 is available, so use it for projects based on GDA94 strictly.

Base Setup

Your base or NTRIP service should be in GDA2020 or GDA94, depending on which datum is used.


When working with Smartnet or AusCORS NTRIP services, make sure to select a correct mount point. Some of them transmit position in GDA94 while others in GDA2020.

When setting up a base station on a benchmark, enter GDA2020 or GDA94 geographic coordinates (lat/long) and ellipsoidal height in the ReachView 3 Settings / Base mode.