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Rover Setup

Coordinate System

Choose a coordinate system based on S-JTSK (such as S-JTSK / Krovak) or S-JTSK [JTSK03] (such as S-JTSK [JTSK03] / Krovak) datums.

Vertical Datum

Choose one of the available vertical datums:

  • Baltic 1957 depth
  • Baltic 1957 height
  • EVRF2007 height

The following geoids are used to perform the transformation:

  • Slovakia_ETRS89h_to_Baltic1957
  • Slovakia_ETRS89h_to_EVRF2007

Base Setup

Your base or NTRIP service should be in ETRS89. The following methods are used to perform the datum conversion: Helmert (7-parameters), Slovakia_JTSK03_to_JTSK grid.


The datum conversion from ETRS89 to S-JTSK uses Helmert (7-parameters) transformation method and the datum conversion from ETRS89 to S-JTSK [JTSK03] uses both Helmert (7-parameters) and Slovakia_JTSK03_to_JTSK grid.

When setting up a base station on a benchmark, enter ETRS89 geographic coordinates (lat/long) and ellipsoidal height in the ReachView 3 Settings / Base mode.