EPSG : 27700
Since version 10.2 Orbit supports the OSGB 1936 / British National Grid as described by the Ordnance Survey.
Both OSTN02 xy and OSGM02 z grid corrections are implemented.
To use this implementation the Ordnance Survey grid file OSTN02_OSGM02_GB.bin (22MB) need to be available in the Orbit directory (program/system/crs).
Download, unzip and copy to the indicated directory : ostn02_osgm02_gb.zip.
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