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.
|