A TOID (TOpographic IDentifier, pronounced toyed) is a unique reference identifier assigned by the Ordnance Survey to identify every feature in Great Britain. The identifier consists of two parts, a prefix ‘osgb’ and a unique identifier that is 13-16 digits long. In GML 2, a TOID is encoded as a gml:fid (Feature Identifier); in GML 3 as a gml:...
See Topographic Identifier.