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Definition

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Code Block
titleEBNF Code
collapsetrue
input = [group] [mobile] "obstacle type" [description] \n
[("location remarks")] ["obstacle identification" {"obstacle identification"}] \n
(point |line|polygon) elevation [height] \n
lighting ["marking description"] \n
"start time" "end time" [schedule] \n
{note} {"affected aerodrome"} {"affected FIR"}.

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Data item

Description

AIXM mapping

group

An indication whether Digital NOTAM refers to a group of obstacles with similar height located in close proximity to one another.

VerticalStructure.group with this list of values CodeYesNoType

mobile

An indication whether the obstacle has no fixed position.

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"

location remarks

A named geographical location where or close to which the obstacle is located (especially for Area 1 obstacles).

Note: the information on relative position of an obstacle may serve as supplementary information for obstacles located closer to the airport. For such purposes free text description of the obstacle position (distance, direction) in relation to relevant airport elements, such as a runway threshold or the control tower should be provided.

VerticalStructure/VerticalStructurePart.annotation with propertyName='horizontalProjection_location' and purpose="REMARK"
Info
titleAIXM 5.1 workaround

In AIXM 5.1, the _ character is not allowed in the pattern for propertyName, therefore, when using AIXM 5.1, the propertyName should be left empty.

obstacle identification

An alphanumerical designator by which the obstacle is identified in the national obstacle database

VerticalStructure.name

point

A tuple of latitude, longitude values 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

Tuples 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

Tuples of latitude/longitude values defining a polygon, including the horizontal reference datum associated with the obstacle extent and location or circle 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

lighting

An indication if the obstacle is lighted.

VerticalStructure.lighted with the following list of values CodeYesNoType

marking description

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='REMARK'

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/beginPosition, Event/EventTimeSlice.validTime/beginPosition and Event/EventTimeSlice.featureLifetime/beginPosition

end time

The end date & time when the obstacle ceases to exist

VerticalStructure/VerticalStructureTimeSlice.featureLifetime/endPositionVerticalStructure/VerticalStructureTimeSlice/

validTime/endPositionEvent/EventTimeSlice.validTime/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}}

note

A free text note that provides further details about the obstacle, such as the reason for which it exists, reduced height at certain times, etc.

VerticalStructure.annotation with purpose='”REMARK'

affected aerodrome

A reference (name, designator) to one or more airports/heliports for which the establishment of the obstacle has an operational relevance and needs to be notified to the users thereof.

Note: Attention: the data provider interface shall warn the operator to check if the information received from the originator is consistent with the airport(s) for which the obstacle is situated in the area of interest for obstacles, as automatically calculated by the application using the obstacle positional data (lat/long).

Event.concernedAirportHeliport
affected FIR

A reference (type, designator) to one or more airspace of type FIR, for which the establishment of the obstacle has an operational relevance and needs to be notified.

Note: the FIR(s) within which the obstacle is physically situated do not need to be provided by the data originator. They will be automatically identified by the application that enables the coding of the Event. If an additional FIR is specified by the originator, the application should check the plausibility of this data based on the FIR boundary. 

Event.concernedAirspace

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