IFC 4.3.0.1 (IFC4X3) development

# 8.9.3.66 IfcSphericalSurface

## 8.9.3.66.1 Semantic definition

The IfcSphericalSurface is a bounded elementary surface. The inherited Position attribute defines the IfcAxisPlacement3D and provides:

• SELF\IfcElementarySurface.Position: The location and orientation of the axis system for the primitive.
• SELF\IfcElementarySurface.Position.Location: The center of the spherical surface.
• SELF\IfcElementarySurface.Position.Position[3]: The z axis points at its positive direction towards the north pole, and by its negative directions towards the south pole.

## 8.9.3.66.4 Formal representation

ENTITY IfcSphericalSurface
SUBTYPE OF (IfcElementarySurface);
END_ENTITY;