Most airspaces may be encoded with just one AirspaceVolume, i.e. a set of vertical limits and one horizontalProjection without referencing or copying other airspace geometries.
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The geometry of most airspaces can be coded with a single AirspaceVolume, by providing its horizontalProjection and vertical limits. In this case the attributes of the association
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class AirspaceComponentGeometry (i.e. operation and operationSequence) will
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not be
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left empty.
For the GML encoding of the Surface see topic Geometry.
Coding Example
The figure below shows a simple example of such an airspace, a Prohibited Area with designator EAP2.
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