buildingSMART IFC5 Property Set

PropertySet Definition:

PropertySet Name COBie_FacilityCommon_UK
Applicable Entities IfcSite
Applicable Type Value NOTDEFINED
Definition The absolute geospatial location referenced to three dimensions using a national coordinate grid system and datum. In Great Britain this is the Ordnance Survey’s National Grid (OSGB36) and Ordnance Datum Newlyn (ODN) coordinates. In Northern Ireland this is the Irish Grid (IG) as used by Ordnance Survey Northern Ireland.

Property Definitions:

Name Property Type Data Type Definition
RefNorthing IfcPropertySingleValue IfcLengthMeasure Northing (ie 234243) to National Grid (OSGB36) and Ordnance Datum
RefEasting IfcPropertySingleValue IfcLengthMeasure Easting (ie 924233) to National Grid (OSGB36) and Ordnance Datum
TrueNorth IfcPropertySingleValue IfcLabel Cartesian vector (ie 0.0, 1.0) indicating the orientation against to National Grid (OSGB36) and Ordnance Datum
UPRN IfcPropertySingleValue IfcLabel The UPRN is the persistent key identifier providing consistency across the OS AddressBase product range. All historic, alternative and provisional addresses for a Basic Land and Property Unit (BLPU) are recorded against the same UPRN.
TOID IfcPropertySingleValue IfcLabel The TOID (ie osgb1000006032892) is an OS unique feature identifier and comes from the OS MasterMap Topography Layer. The TOID is a 13 to 16 character number that is prefixed with “osgb” and which stays the same throughout the life of a feature.
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