Point
Most obstacles may be coded with a simple point geometry (e.g. antenna, pole, wind turbine, etc. ). The example below shows the coding of the point location and geometry of an antenna.
<aixm:VerticalStructure gml:id="uuid.5f68d835-828c-4ccd-91b7-791058d9dd4d">
<gml:identifier codeSpace="urn:uuid:">5f68d835-828c-4ccd-91b7-791058d9dd4d</gml:identifier>
...
<aixm:part>
<aixm:VerticalStructurePart gml:id="V-af4ee6d6">
...
<!-- horizontalProjection required by PANS-AIM Table A6-2 "horizontal position" and ENR 5.4,AD 2/3.10 "obstacle position" -->
<aixm:horizontalProjection_location>
<aixm:ElevatedPoint srsName="urn:ogc:def:crs:EPSG::4326" gml:id="p1121">
<gml:pos>52.36171388888889 -28.03756666666666</gml:pos>
<!-- horizontalAccuracy required by PANS-AIM Table A6-2 -->
<aixm:horizontalAccuracy uom="M">50</aixm:horizontalAccuracy>
...
</aixm:ElevatedPoint>
</aixm:horizontalProjection_location>
...
Line
Some obstacles may be coded as a single part line obstacle (e.g. a fence, wall, etc.). The example below shows the coding of the location and line geometry of a windfarm consisting of wind turbines positioned in a line. In this example, all wind turbines have the same height and elevation.
<!-- LINE OBSTACLE (Windfarm)
1x VerticalStructure with 1 x VerticalStructurePart as linearExtent
(Can only be used in case all verticalStructure elements have same values for all "parts" of the obstacle..-->
<aixm:VerticalStructure gml:id="uuid.718c2782-a624-405e-86b6-144b40b680b0">
<gml:identifier codeSpace="urn:uuid:">718c2782-a624-405e-86b6-144b40b680b0</gml:identifier>
...
<aixm:type>WINDMILL_FARMS</aixm:type>
...
<aixm:part>
<aixm:VerticalStructurePart gml:id="vsp0006-1">
...
<aixm:type>WINDMILL_FARMS</aixm:type>
...
<aixm:horizontalProjection_linearExtent>
<aixm:ElevatedCurve srsName="urn:ogc:def:crs:EPSG::4326" gml:id="crv12456">
<gml:segments>
<gml:GeodesicString>
<gml:posList>54.33333333 -26.48555556 54.33777778 -26.45777778</gml:posList>
</gml:GeodesicString>
</gml:segments>
<aixm:horizontalAccuracy uom="M">50</aixm:horizontalAccuracy>
<aixm:elevation uom="M">75</aixm:elevation>
<aixm:verticalDatum>EGM_96</aixm:verticalDatum>
<aixm:verticalAccuracy uom="M">30</aixm:verticalAccuracy>
</aixm:ElevatedCurve>
</aixm:horizontalProjection_linearExtent>
...
</aixm:VerticalStructurePart>
</aixm:part>
...
Polygon
Some obstacles may be coded as a single part polygon obstacle (e.g. a building, stadium etc.).  The example below shows the coding of the location and surface geometry a Building.
<!-- POLYGON OBSTACLE Area 3 (Control Tower) -->
<aixm:VerticalStructure gml:id="uuid.d22653bd-826d-411c-b8d3-838eba2a8325">
<gml:identifier codeSpace="urn:uuid:">d22653bd-826d-411c-b8d3-838eba2a8325</gml:identifier>
...
<aixm:part>
<aixm:VerticalStructurePart gml:id="ID_210">
<...
<aixm:type>BUILDING</aixm:type>
<aixm:designator>OBS-EADD-0009</aixm:designator>
<aixm:horizontalProjection_surfaceExtent>
<aixm:ElevatedSurface srsName="urn:ogc:def:crs:EPSG::4326" gml:id="ID_211">
<gml:patches>
<gml:PolygonPatch>
<gml:exterior>
<gml:Ring>
<gml:curveMember>
<gml:Curve gml:id="C001117">
<gml:segments>
<gml:GeodesicString>
<gml:posList>52.373240585956786 -31.94466222350188
52.373239760561745 -31.943667276726224
52.37253439745958 -31.943665099679613
52.37248632123943 -31.944468912666462
52.37259178856422 -31.94439396362618
52.37273479940925 -31.944331784997903
52.372846720940146 -31.944338002860732
52.37298351392235 -31.94438774576335
52.373107871178895 -31.94453075660838
52.373240585956786
-31.94466222350188</gml:posList>
</gml:GeodesicString>
</gml:segments>
</gml:Curve>
</gml:curveMember>
</gml:Ring>
</gml:exterior>
</gml:PolygonPatch>
</gml:patches>
...
</aixm:ElevatedSurface>
</aixm:horizontalProjection_surfaceExtent>
...
Multi-part obstacle
Some obstacles may be coded as multi part obstacle, with the all the parts having their own geometry and location (e.g. a building with an antenna on top, cable care with poles/buildings and catenary in between, etc.).Â
The example below show the encoding of the geometry and location of a cableway with a ground station, a top station (elevatedPoint) and a catenary in between (elevatedCurve).
<!-- LINE OBSTACLE (Cableway)
1x VerticalStructure with several VerticalStructurePart. -->
<aixm:VerticalStructure gml:id="uuid.87a585b3-0597-4f5c-974f-cddfc604dc93">
...
<aixm:type>CABLE_CAR</aixm:type>
...
<!-- PART1: LANGTALERECKHUETTE (Ground Station) of Cable Way -->
<aixm:part>
<aixm:VerticalStructurePart gml:id="vsp0004-1">
...
<aixm:type>BUILDING</aixm:type>
<aixm:designator>OBS-0004-1</aixm:designator>
<aixm:horizontalProjection_location>
<aixm:ElevatedPoint srsName="urn:ogc:def:crs:EPSG::4326" gml:id="ep0004-1">
<gml:pos>46.82722222 -27.99166667</gml:pos>
...
</aixm:ElevatedPoint>
</aixm:horizontalProjection_location>
</aixm:VerticalStructurePart>
</aixm:part>
<!-- PART2: Line (rope) between Ground Station and Top Station -->
<aixm:part>
<aixm:VerticalStructurePart gml:id="vsp0004-2">
...
<aixm:type>CATENARY</aixm:type>
<aixm:designator>OBS-0004-2</aixm:designator>
<aixm:horizontalProjection_linearExtent>
<aixm:ElevatedCurve srsName="urn:ogc:def:crs:EPSG::4326" gml:id="crv1242">
<gml:segments>
<gml:GeodesicString>
<gml:posList>46.82722222 -27.99166667 46.80555556 -27.98638889</gml:posList>
</gml:GeodesicString>
</gml:segments>
...
</aixm:ElevatedCurve>
</aixm:horizontalProjection_linearExtent>
</aixm:VerticalStructurePart>
</aixm:part>
<!-- PART3: HOCHWILDEHAUS (Top Station) of Cable Way -->
<aixm:part>
<aixm:VerticalStructurePart gml:id="vsp0004-3">
..>
<aixm:type>BUILDING</aixm:type>
<aixm:designator>OBS-0004-3</aixm:designator>
<aixm:horizontalProjection_location>
<aixm:ElevatedPoint srsName="urn:ogc:def:crs:EPSG::4326" gml:id="ep0004-3">
<gml:pos>46.80555556 -27.98638889</gml:pos>
...
</aixm:ElevatedPoint>
</aixm:horizontalProjection_location>
</aixm:VerticalStructurePart>
</aixm:part>
</aixm:VerticalStructureTimeSlice>
</aixm:timeSlice>
</aixm:VerticalStructure>
The example below show the encoding of a building (elevatedSurface) with an antenna (elevatedPoint) mounted on the rooftop.
<!-- POINT ON SURFACE: roof mounted antenna (Vertical Segmentation: 2 parts)-->
<aixm:VerticalStructure gml:id="uuid.15c2c2ba-c5f2-47b5-9ada-1964d51b82c0">
<gml:identifier codeSpace="urn:uuid:">15c2c2ba-c5f2-47b5-9ada-1964d51b82c0</gml:identifier>
...
<aixm:part>
<aixm:VerticalStructurePart gml:id="vsp0007-1">
...
<aixm:type>BUILDING</aixm:type>
<aixm:designator>OBS-00007-1</aixm:designator>
<aixm:horizontalProjection_surfaceExtent>
<aixm:ElevatedSurface srsName="urn:ogc:def:crs:EPSG::4326" gml:id="ep0007-1">
<gml:patches>
<gml:PolygonPatch>
<gml:exterior>
<gml:Ring>
<gml:curveMember>
<gml:Curve gml:id="c4567">
<gml:segments>
<gml:GeodesicString>
<gml:posList>55.5243055555556 -24.64125833333333
55.5201388888889 -24.63178888888889
55.5211666666667 -24.63032222222222
55.5251944444444 -24.63868888888889
55.5243055555556 -24.64125833333333</gml:posList>
</gml:GeodesicString>
</gml:segments>
</gml:Curve>
</gml:curveMember>
</gml:Ring>
</gml:exterior>
</gml:PolygonPatch>
</gml:patches>
...
</aixm:ElevatedSurface>
</aixm:horizontalProjection_surfaceExtent>
...
</aixm:part>
<aixm:part>
<aixm:VerticalStructurePart gml:id="vsp0007-2">
...
<aixm:type>ANTENNA</aixm:type>
<aixm:designator>OBS-00007-2</aixm:designator>
<aixm:horizontalProjection_location>
<aixm:ElevatedPoint srsName="urn:ogc:def:crs:EPSG::4326" gml:id="VID000005">
<gml:pos>55.52416667 -24.63888889</gml:pos>
....
</aixm:ElevatedPoint>
</aixm:horizontalProjection_location>
...
</aixm:VerticalStructurePart>
</aixm:part>
</aixm:VerticalStructureTimeSlice>
</aixm:timeSlice>
</aixm:VerticalStructure>
