Supporting material for ICAO Aerodrome Mapping Data Sets
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| Excerpt |
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| This section provides ‘VerticalPointStructure’ feature data encoding guidance. |
| Table of Contents |
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Vocabulary
Information concept:
VerticalStructure: http://www.airm.aero/viewer/1.0.0/conceptual-model.html#VerticalStructure
Data concept:
VerticalStructure: http://www.airm.aero/viewer/1.0.0/logical-model.html#VerticalStructure
Information concepts indicate the reference vocabulary and relations of an VerticalPointStructure with other concepts. Data concepts indicate the reference features and properties for service architects, information/data architects and system implementers.
General
AMD data encoding can start when the necessary geographic information, aeronautical information and basic knowledge regarding the structure of created feature is available.
From the geographical point of view, the VerticalPointStructure represents all objects with only one location that extend above the surface of the Earth. This object can be represented by one geographical location – point (e.g. lamp). The one geographical location of the VerticalPointStructure shall be measured. The key attributes are the longitude, latitude and the elevation in reference with WGS-84. In the next part the process of converting the geographical information into the GML form thus into geometry information is described.
Based on Aeronatical Data Catalogue the required type of geometry for feature VerticalPointStructure/Obstacle is 'Point'. The definition of Point can be found in the Table A1-9 Data types in the Aeronautical Data Catalogue.
Feature VerticalPointStructure as part of AMD has close association with Terrain and Obstacle dataset (eTOD). Vertical structures as part of AMD has its own specific role. It is important to understand, that every Obstacle from the eTOD has to be a VerticalStructure in AMD, but not every VerticalStructure from the AMD has to be an Obstacle in eTOD. It means not every VerticalStructures has to be classified as an Obstacle thus be part of the eTOD.
AMD encoding
AIXM 5.1
ED-99 feature VerticalPointStructure is mapped in the AIXM 5.1 as feature VerticalStructure with selected type of geometry - Point.
Geometry
In the AIXM 5.1 the geometry of the VerticalPointStructure is point encoded as object ElevatedPoint.
For more information regarding AIXM 5.1 Geometry encoding follow 'AIXM data coding'.
GML considerations:
AIXM 5.1 is based on GML. Hence, obtained geographical location shall be transferred into a GML geometry object Point.
Figure 1 : VerticalPointStructure
Time
Feature VerticalPointStructure shall be established in accordance with coding rules and requirements listed in AIXM 5.1 Temporality Model.
AIXM 5.1 features
VerticalPointStructure is encoded to the AIXM 5.1 as feature – VerticalStructure.
All associations are shown in the UML Diagram (see below).
VerticalStructure feature
http://aixm.aero/sites/aixm.aero/files/imce/AIXM51HTML/AIXM/Class_VerticalStructure.html
UML Diagram
http://aixm.aero/sites/aixm.aero/files/imce/AIXM51HTML/AIXM/Diagram_VerticalStructures.html
| Info | ||
|---|---|---|
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The following AMD properties are not covered in the AIXM 5.1. coding example: vres, hres, integr. These are covered by an AIXM 5.1. extension. |
Coding example - Structure of message
| Code Block | ||||
|---|---|---|---|---|
| ||||
<AIXMBasicMessage ...>
<aixm:messageMetadata>
</aixm:messageMetadata>
<hasMember>
<aixm:AirportHeliport gml:id="uuid.0b7a2688-ab95-47e6-82c2-23fe321c4a48">
</hasMember>
<hasMember>
<aixm:VerticalStructure gml:id="uuid.1b0a9505-e08f-465c-8d9b-06ae26ad3739">
</hasMember>
<hasMember>
<aixm:ObstacleArea gml:id="uuid.551ebd94-6a02-4935-bf33-d0432bfae7e3">
</hasMember>
</AIXMBasicMessage> |
Coding example - VerticalPointStructure
| Code Block | ||||
|---|---|---|---|---|
| ||||
<hasMember>
<aixm:VerticalStructure gml:id="uuid.1b0a9505-e08f-465c-8d9b-06ae26ad3739">
<gml:identifier codeSpace="urn:uuid:">1b0a9505-e08f-465c-8d9b-06ae26ad3739</gml:identifier>
<aixm:timeSlice>
<aixm:VerticalStructureTimeSlice gml:id="uuid.77a9a6f8-f350-43cc-baa8-9a27f6cdecb4">
<gml:validTime>
<gml:TimePeriod gml:id="uuid.8836ab89-8dd5-48d5-a833-01dbc9484065">
<gml:beginPosition>2020-09-01T00:00:00Z</gml:beginPosition>
<gml:endPosition indeterminatePosition="unknown" />
</gml:TimePeriod>
</gml:validTime>
<aixm:interpretation>BASELINE</aixm:interpretation>
<aixm:sequenceNumber>1</aixm:sequenceNumber>
<aixm:correctionNumber>0</aixm:correctionNumber>
<aixm:featureLifetime>
<gml:TimePeriod gml:id="uuid.576895ed-5286-4c1b-a384-d511fa24df0a">
<gml:beginPosition>2020-09-01T00:00:00Z</gml:beginPosition>
<gml:endPosition indeterminatePosition="unknown" />
</gml:TimePeriod>
</aixm:featureLifetime>
<aixm:type>ANTENNA</aixm:type>
<aixm:markingICAOStandard>YES</aixm:markingICAOStandard>
<aixm:radius uom="M">10</aixm:radius>
<aixm:lightingICAOStandard>YES</aixm:lightingICAOStandard>
<aixm:part>
<aixm:VerticalStructurePart gml:id="uuid.df70d5de-73bd-46c4-8cdd-38105d1bc535">
<aixm:verticalExtent uom="M">10</aixm:verticalExtent>
<aixm:visibleMaterial>STEEL</aixm:visibleMaterial>
<aixm:horizontalProjection_location>
<aixm:ElevatedPoint gml:id="uuid.aaf2e6ff-f8d5-4289-b044-f74ba51e6548" srsName="urn:ogc:def:crs:EPSG::4326">
<gml:pos>50.10375063 14.28132534</gml:pos>
<aixm:horizontalAccuracy uom="M">0.5</aixm:horizontalAccuracy>
<aixm:elevation uom="M">376</aixm:elevation>
<aixm:verticalAccuracy uom="M">0.5</aixm:verticalAccuracy>
</aixm:ElevatedPoint>
</aixm:horizontalProjection_location>
</aixm:VerticalStructurePart>
</aixm:part>
</aixm:VerticalStructureTimeSlice>
</aixm:timeSlice>
</aixm:VerticalStructure>
</hasMember> |
Download feature VerticalPointStructure:
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