The OSGB36 TRF is a Terrestrial Reference Frame that realises the OSGB36 datum by a network of control points with known OSGB36 coordinates and ellipsoid heights, established by triangulation and levelling surveys.
The OSGB36 TRF is a Terrestrial Reference Frame that realises the OSGB36 datum by a network of control points with known OSGB36 coordinates and ellipsoid heights, established by triangulation and levelling surveys.
OSGB36 is a coordinate system used for mapping in Britain, based on the Airy 1830 ellipsoid and the OSGB36 datum.
The OSGB36 datum is set of conventions that define the origin, orientation and scale of the OSGB36 coordinate system, based on the position and orientation of the Airy 1830 ellipsoid at the fundamental point of the Royal Observatory, Greenwich in 1936.
Existing survey stations that can be used as the starting point for new surveys. See also Horizontal Control and Vertical Control.