Definition
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Data item | value | AIXM mapping | |||||
|---|---|---|---|---|---|---|---|
group | An indication whether the obstacle consists of a number of closely situated similar objects, for which a simple lat/long position (and eventually radius) is provided. | VerticalStructure.group with this list of values CodeYesNoType | |||||
mobile | An indication whether the obstacle is expected to move around its nominal location | VerticalStructure/VerticalStructurePart.mobile with this list of values CodeYesNoType | |||||
obstacle type | A type of vertical structure | VerticalStructure.type and VerticalStructure/VerticalStructurePart.type with this list of values CodeVerticalStructureType | |||||
description | A textual description of the obstacle, such as the number of similar items for a group, etc. | VerticalStructure.annotation with propertyName="type" and purpose="DESCRIPTION" | |||||
airport | Information such as designator or name used to identify the airport where the obstacle is located | VerticalStructure.annotation with purpose="WARNING" | |||||
location | A named geographical location where or close to which the obstacle is located (especially for Area 1 obstacles) | VerticalStructure.name | |||||
identifier | An alphanumerical designator by which the obstacle is identified in the national obstacle database | VerticalStructure/VerticalStructurePart.designator | |||||
start time | The effective date & time when the obstacle starts to exist. This might be further detailed in a "schedule". | VerticalStructure/VerticalStructureTimeSlice.featureLifetime/beginPosition, VerticalStructure/VerticalStructureTimeSlice/validTime/timePosition, Event/EventTimeSlice.validTime/timePosition and Event/EventTimeSlice.featureLifetime/beginPosition | |||||
end time | The end date & time when the obstacle ceases to exist | VerticalStructure/VerticalStructureTimeSlice.featureLifetime/endPosition and Event/EventTimeSlice.featureLifetime/endPosition also applying the rules for {{Events with estimated end time}} | |||||
schedule | A schedule might be provided, in case the obstacle is only active according to a regular timetable, within the period between the start of life and the end of life. | VerticalStructure/VerticalStructurePart/Timesheet/...according to the rules for {{Schedules}} | |||||
point | The latitude, longitude and horizontal reference datum associated with the obstacle position. | VerticalStructure/VerticalStructurePart/ElevatedPoint according to the rules for encoding for encoding {{Geometrical and geographical data}} | |||||
line | Pairs of latitude/longitude values along a line, including the horizontal reference datum associated with the obstacle extent and location | VerticalStructure/VerticalStructurePart/ElevatedCurveaccording to the rules for encoding for encoding {{Geometrical and geographical data}} | |||||
polygon | Pairs of latitude/longitude values defining a polygon, including the horizontal reference datum associated with the obstacle extent and location | VerticalStructure/VerticalStructurePart/ElevatedSurfaceaccording to the rules for encoding for encoding {{Geometrical and geographical data}} | |||||
circle | A type of polygon in which all the points are located at constant geodesic distance from the centre of the circle. | VerticalStructure/VerticalStructurePart/ElevatedSurfaceaccording to the rules for encoding for encoding {{Geometrical and geographical data}} | |||||
elevation | The elevation (distance from Mean See Level) at the top of the obstacle. | VerticalStructure/VerticalStructurePart/ElevatedPoint or ElevatedSurface or ElevatedCurve/elevation including its unit of measure | |||||
height | The distance between the uppermost and the lowermost parts of the obstacle. | VerticalStructure/VerticalStructurePart.verticalExtent | |||||
relative position | A free text description of the obstacle position in relation to relevant airport elements, such as a runway threshold or the control tower. | VerticalStructure/VerticalStructurePart.annotation with propertyName="horizontalProjection_location" and purpose="REMARK"
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lighting | An indication if the obstacle is lighted. | VerticalStructure.lightedwith the following list of valuesCodeYesNoType | |||||
marking description | Further details of the obstacle marking and lighting, such as times when lighting is available, compliance with the ICAO standards, etc. Also includes the description of visual markers (other than lights) that are installed on the obstacle, such as painting, flags, signs, etc. | VerticalStructure.annotation with propertyName="markingICAOStandard" and purpose="DESCRIPTION" | |||||
note | A free text note that provides further details about the obstacle, such as the reason for which it exists, reduced hight at certain times, etc. | VerticalStructure.annotation with purpose=”REMARK” |
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EV 1.0 wording: It is assumed that an “area of interest for obstacles” is available as BASELINE data for all airports that have an ICAO location designator and which are situated in the area of responsibility of the data provider. For international airports, this could be the Area 2 as defined by the ICAO Annex 15. For some airports (such as Innsbruck, Anchorage, etc.) this might be much larger.
Alternative wording: It is assumed that information about the area already exists in the form of VerticalStructure BASELINE TimeSlice(s) covering the complete period of validity of the event, coded as specified in the Coding Guidelines for the (ICAO) Obstacle Data Sets.
Data encoding rules
The data encoding rules provided in this section shall be followed in order to ensure the harmonisation of the digital encodings provided by different sources. The compliance with some of these encoding rules can be checked with automatic data validation rules.
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