Most airspaces may be encoded with just one AirspaceVolume, i.e. a set of vertical limits and one horizontalProjection without referencing or coping copying other airspace geometries.
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| In case the airspace consists of just one airspace volume, the attributes of the association classes AirspaceComponentGeometry will not be coded. The AirspaceVolumeDependency will not be used. |
For the GML encoding of the Surface see document 12-028_Use_of_GML_for_aviation_data.pdf.
Coding Example
The figure below show 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 15NM as lateral limit:
:
The figure below shows the encoding of an AirspaceVolume mapped form the AIXM UML to the AIXM XML:
Note that in the coding of the upper limit is does not conform with the guidelines. It should be 'FT ' 'UNL' instead of 'FL' '999'.
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