IFC 4.3.0.1 (IFC4X3_TC1)

4.8.1.15 Survey Points Geometry

Elements may provide a 'SurveyPoints' representation for defining a contour such as for IfcSite. It contains the survey points as a set of Cartesian points and optionally breaklines.

The representation identifier and type and the only allowed single representation item of the 'SurveyPoints' representation are:

The following diagram shows the generic classes and relationships used when applying this concept. In addition, concepts may have particular importance to common or standardised industry practices and scenarios. For these specific usage scenarios, the tables below shows a recommended list of general usage patterns that users may adopt.

G IfcSite IfcSite 1. GlobalId [1:1] 2. OwnerHistory [0:1] 3. Name [0:1] 4. Description [0:1]      HasAssignments [0:?]      Nests [0:1]      IsNestedBy [0:?]      HasContext [0:1]      IsDecomposedBy [0:?]      Decomposes [0:1]      HasAssociations [0:?] 5. ObjectType [0:1]      IsDeclaredBy [0:1]      Declares [0:?]      IsTypedBy [0:1]      IsDefinedBy [0:?] 6. ObjectPlacement [0:1] 7. Representation [0:1]      ReferencedBy [0:?]      PositionedRelativeTo [0:?]      ReferencedInStructures [0:?] 8. LongName [0:1]      ContainsElements [0:?]      ServicedBySystems [0:?]      ReferencesElements [0:?]      IsInterferedByElements [0:?]      InterferesElements [0:?] 9. CompositionType [0:1] 10. RefLatitude [0:1] 11. RefLongitude [0:1] 12. RefElevation [0:1] 13. LandTitleNumber [0:1] 14. SiteAddress [0:1] IfcProductDefinitionShape IfcProductDefinitionShape 1. Name [0:1] 2. Description [0:1] 3. Representations [1:?]      ShapeOfProduct [1:?]      HasShapeAspects [0:?] IfcSite:Representation1->IfcProductDefinitionShape:IfcProductDefinitionShape0 IfcShapeRepresentation IfcShapeRepresentation 1. ContextOfItems [1:1] Identifier 2. RepresentationIdentifier [0:1] Type 3. RepresentationType [0:1] Items 4. Items [1:?]      RepresentationMap [0:1]      LayerAssignments [0:?]      OfProductRepresentation [0:?]      OfShapeAspect [0:1] IfcProductDefinitionShape:Representations1->IfcShapeRepresentation:IfcShapeRepresentation0 IfcGeometricRepresentationContext IfcGeometricRepresentationContext 1. ContextIdentifier [0:1] 2. ContextType [0:1]      RepresentationsInContext [0:?] 3. CoordinateSpaceDimension [1:1] 4. Precision [0:1] 5. WorldCoordinateSystem [1:1] 6. TrueNorth [0:1]      HasSubContexts [0:?]      HasCoordinateOperation [0:1] IfcShapeRepresentation:ContextOfItems1->IfcGeometricRepresentationContext:IfcGeometricRepresentationContext0 IfcLabel_0 IfcLabel IfcShapeRepresentation:RepresentationIdentifier1->IfcLabel_0:IfcLabel0 IfcLabel_1 IfcLabel IfcShapeRepresentation:RepresentationType1->IfcLabel_1:IfcLabel0 IfcGeometricCurveSet IfcGeometricCurveSet      LayerAssignment [0:1]      StyledByItem [0:1] 1. Elements [1:?] IfcShapeRepresentation:Items1->IfcGeometricCurveSet:IfcGeometricCurveSet0 constraint_0 =SurveyPoints IfcLabel_0->constraint_0 constraint_1 =GeometricCurveSet IfcLabel_1->constraint_1 IfcCartesianPoint IfcCartesianPoint      LayerAssignment [0:1]      StyledByItem [0:1] 1. Coordinates [1:3] IfcGeometricCurveSet:Elements1->IfcCartesianPoint:IfcCartesianPoint0 IfcPolyline IfcPolyline      LayerAssignment [0:1]      StyledByItem [0:1] 1. Points [2:?] IfcGeometricCurveSet:Elements1->IfcPolyline:IfcPolyline0
Figure 4.8.1.15.A

General Usage

ApplicableEntity
IfcSite
Table 4.8.1.15.B