Coding guidelines
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Some specific obstacles, such as an ILS glide path antenna, may be located in the close vicinity of a runway due to operational needs, on condition that they have the lowest possible physical strength.
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According to ICAO Annex 14, information about frangibility of the obstacle needs to be provided only for obstacles situated in the vicinity of the runways, in particular for obstacles in the Clearway (CWY) and the Runway End Safety Area (RESA).
Coding example
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Navaid as Obstacle (frangible)
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<!-- NAVAID OBSTACLE. Area 2a RWY 09L/27R and Area 3 (Glidepath) --> <message:hasMember> <aixm:VerticalStructure gml:id="uuid.c9bc6ea4-2b5e-4a71-af8a-eec2e4ff3dc3"> <gml:identifier codeSpace="urn:uuid:">c9bc6ea4-2b5e-4a71-af8a-eec2e4ff3dc3</gml:identifier> ... <aixm:name>OBS-EADD-1005 (GP 27R)</aixm:name> <aixm:type>NAVAID</aixm:type> ... <aixm:part> <aixm:VerticalStructurePart gml:id="vsp00013-1"> <aixm:verticalExtent uom="M">5.0</aixm:verticalExtent> <aixm:verticalExtentAccuracy uom="M">0.5</aixm:verticalExtentAccuracy> <aixm:type>NAVAID</aixm:type> <aixm:frangible>YES</aixm:frangible> <aixm:horizontalProjection_location> <aixm:ElevatedPoint srsName="urn:ogc:def:crs:EPSG::4326" gml:id="ep00013-1"> <gml:pos>52.378444 -31.926778</gml:pos> <aixm:horizontalAccuracy uom="M">0.5</aixm:horizontalAccuracy> <aixm:elevation uom="M">35.0</aixm:elevation> <aixm:verticalDatum>EGM_96</aixm:verticalDatum> <aixm:verticalAccuracy uom="M">0.5</aixm:verticalAccuracy> </aixm:ElevatedPoint> </aixm:horizontalProjection_location> <aixm:lighting> <aixm:LightElement gml:id="le00013-1"> <aixm:colour>RED</aixm:colour> </aixm:LightElement> </aixm:lighting> </aixm:VerticalStructurePart> </aixm:part> <aixm:hostedNavaidEquipment xlink:href="urn:uuid:4c46c5be-b033-4673-ac70-48a5d72793d2" xlink:title="Glidepath 27R"/> </aixm:VerticalStructureTimeSlice> </aixm:timeSlice> </aixm:VerticalStructure> |
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