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.

Example 1: ElevatedPoint

		<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.

Example 2: ElevatedCurve

		<!-- 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.

Example 3: ElevatedSurface

		<!-- 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.).

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).

Example 4-1: Multiple Parts

		<!-- 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.

Example 4-2: Multi Part Obstacle

		<!-- 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>

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