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.
Note
In case the airspace consists of just one airspace volume, the attributes of the association classes AirspaceComponentGeometry (i.e. operation and operationSequence) will not be coded. The AirspaceVolumeDependency will not be used.
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.
The geometry of EAP2 is defined by vertical limits from ground to unlimited and a circle of 15NM as lateral limit:
:
The figure below shows the encoding of an AirspaceVolume mapped from the AIXM UML to the AIXM XML:
Note that the coding of the upper limit does not conform with the guidelines. It should be 'FT' 'UNL' instead of 'FL' '999'.
