Skip to main content


Rover Setup

Coordinate System

Choose a coordinate system based on Belge 1972 (such as Belge 1972 / Belgian Lambert 72) or ETRS89 (such as ETRS89 / Belgium Lambert 2008) datums.

Vertical Datum

Choose the Belgium HBG18 height vertical datum.

The HBG18 geoid is used to perform the transformation.

Base Setup

Your base or NTRIP service should be in ETRS89. The bd72lb72_etrs89lb08 grid is used to perform the datum conversion.


The datum conversion from ETRS89 to Belge 1972 uses bd72lb72_etrs89lb08 grid

When setting up a base station on a benchmark, enter ETRS89 geographic coordinates (lat/long) and ellipsoidal height in the Emlid Flow Base settings.