...
- by providing a horizontal projection with vertical limits;
- by providing a composition rule by which the airspace is defined as a series of unions, intersections, subtractions of other airspace(s).
For the first option, the AirspaceVolume class with a related Surface will be used for the encoding.
For the second option, the airspace compostion composition will be encoded by using the AirspaceGeometryComponent class or the AirspaceVolumeDependency class.
...
Furthermore, within an airspace a Service mas be provided by a Unit using one or more RadioCommunicationChannel.
Airspaces and also the service provided by the ATS unit may have operate under certain schedules.
For special activity airspaces, also information about the existing type of restriction or nature of hazard, activation process and/or time of activity may be provided using the AirspaceActivation class.
...
Coding Example can be found in the AIXM DONLON ACGAIP file.
| No. | Description | XPath Expression |
|---|---|---|
| 1 | ATS airspace type FIR | //aixm:Airspace//*[aixm:type='FIR'] |
| 2 | Special activity airspace type Danger Area | //aixm:Airspace//*[aixm:type='D'] |
| 3 | Transition Altitude | //aixm:AirportHeliport//aixm:transitionAltitude |