IFC 4.3.0.1 (IFC4X3) development

8.18.2.2 IfcGeometricProjectionEnum

8.18.2.2.1 Semantic definition

IfcGeometricProjectionEnum defines the various representation types that can be semantically distinguished. Often different levels of detail of the shape representation are controlled by the representation type.

8.18.2.2.2 Type values

Type Description
ELEVATION_VIEW

Geometric display representation that shows a full 2D element representation, the level of detail often depends on the target scale, e.g. representing a wall by its bounding edges if the element is within an elevation view.

GRAPH_VIEW

Geometric display representation that shows an abstract, often 1D element representation, e.g. representing a wall by its axis line.

MODEL_VIEW

Geometric display representation that shows a full 3D element representation, e.g. representing a wall by its volumetric body.

PLAN_VIEW

Geometric display representation that shows a full 2D element representation, the level of detail often depends on the target scale, e.g. representing a wall by its two foot print edges and the edges of all inner layers. The projection is shown in ground view as seen from above.

REFLECTED_PLAN_VIEW

Geometric display representation that shows a full 2D element representation, the level of detail often depends on the target scale, e.g. representing a wall by its two foot print edges and the edges of all inner layers. The projection is shown in ground view as seen from below.

SECTION_VIEW

Geometric display representation that shows a full 2D element representation, the level of detail often depends on the target scale, e.g. representing a wall by its two inner/outer edges and the edges of all inner layers, if the element is cut by the section line.

SKETCH_VIEW

Geometric display representation that shows an abstract, often 2D element representation, e.g. representing a wall by its two foot print edges, suppressing any inner layer representation.

USERDEFINED

A user defined specification is given by the value of the UserDefinedTargetView attribute.

NOTDEFINED

No specification given.

Table 8.18.2.2.A

8.18.2.2.3 Formal representation

TYPE IfcGeometricProjectionEnum = ENUMERATION OF
	(ELEVATION_VIEW
	,GRAPH_VIEW
	,MODEL_VIEW
	,PLAN_VIEW
	,REFLECTED_PLAN_VIEW
	,SECTION_VIEW
	,SKETCH_VIEW
	,USERDEFINED
	,NOTDEFINED);
END_TYPE;

8.18.2.2.4 References

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