Skip to main content

United Kingdom

Rover Setup

Coordinate System

Choose a coordinate system based on the OSGB 1936 datum (such as OSGB 1936 / British National Grid).

Vertical Datum

Choose one of the available vertical datums:

  • Belfast height
  • Douglas height
  • ODN (Offshore) height
  • ODN Orkney height
  • ODN height
  • St. Marys height
  • Stornoway height

The following geoids are used to perform the transformation:

  • OSGM15_Belfast
  • OSGM15_GB

Base Setup

Your base or NTRIP service should be in ETRS89. The OSTN15 grid is used to perform the datum conversion.

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