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Surface geometry

SURVEY-SURFACE

Terrain surface as modelled surface geometry - documented terrain model in the shared reference frame.

Description

Surveyed terrain form with position and height in the LV95 reference frame.
Basis for point-cloud alignment and decisions on demolition, new build, or conversion.

Modelling guidelines

Model as surface geometry according to the surveyor delivery; assign to the planning perimeter.
Position and height in LV95; align with the point cloud.

Attributes

Name	Description	Unit
PredefinedType	Marks the element as a terrain surface. Allowed values `TERRAIN` - terrain
ObjectType	Kind of proxy element as terrain surface. Allowed values `Gelände` - modelled terrain surface in the reference model Note IFC2x3 substitute for PredefinedType.
Name	Terrain surface designation according to the survey or project.