At export, a Terrain entity attached to a Site is exported as IfcGeographicElement with the predefined type TERRAIN as follows. #1234=IFCGEOGRAPHICELEMENT('UUID',$,$,$,$,#111,#222,$,.TERRAIN.);Note:
Only Terrains attached to a Site can be exported.
At import, IfcGeographicElement with the predefined type TERRAIN is imported as a Terrain typed object, attached to the AEC Site. When importing an IFC4 file, an IfcGeographicElement with the predefined type TERRAIN is imported as a Terrain typed object, attached to the AEC Site. In exact mode, when the geometry of an IFC Terrain is tessellated, the geometry is imported into a CldBody in a 3D rep, as follows.
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