This section provides "AerodromeReferencePoint" data encoding guidance.

Vocabulary

	ED-99	ED-119/AMXM	AIXM 5.1	AIRM
Name	AerodromeReferencePoint	AM_AerodromeReferencePoint	AirportHeliport[Property ‘ARP’]	AerodromeReferencePoint

Information concept:

AerodromeReferencePoint: http://www.airm.aero/viewer/1.0.0/conceptual-model.html#AerodromeReferencePoint → http://www.airm.aero/viewer/1.0.0/conceptual-model/AerodromeReferencePoint.html

Data concept:

Aerodrome: http://www.airm.aero/viewer/1.0.0/logical-model.html#Aerodrome

Information concepts indicate the reference vocabulary and relations of an AerodromeReferencePoint 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 AerodromeReferencePoint represents the designated geographical location of an aerodrome. This location shall be measured with required accuracy. 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 Aeronautical Data Catalogue the required type of geometry for feature AerodromeReferencePoint is 'Point'. The definition of Point can be found in the Table A1-9 Data types in the Aeronautical Data Catalogue.

AMD encoding

AIXM 5.1

ED-99 AerodromeReferencePoint is mapped in the AIXM 5.1 as property 'ARP' of feature AirportHeliport.

Geometry

In the AIXM 5.1 the geometry of the feature ARP 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 locations shall be transferred into a GML geometry object Point.

Figure 1: AerodromeReferencePoint

Time

Feature AirportHeliport with property AerodromeReferencePoint (ARP) shall be established in accordance with coding rules and requirements listed in AIXM 5.1 Temporality Model.

AIXM 5.1 features

In the AIXM 5.1 the geometry of the ARP is encoded as object ElevatedPoint. The ARP is associated from the feature AirportHeliport via the hasReferencePoint association in the AirportHeliport feature.

All associations are shown in the UML Diagram (see below).

AirportHeliport feature

http://aixm.aero/sites/aixm.aero/files/imce/AIXM51HTML/AIXM/Class_AirportHeliport.html

UML Diagram

http://aixm.aero/sites/aixm.aero/files/imce/AIXM51HTML/AIXM/Diagram_AirportHeliport.html

Content of example

The following AMD properties are not covered in the AIXM 5.1. coding example: vres, hres, integr, systems, mintelev, maxtelev, avgtelev, devtelev, maxtgrad, devtgrad. These are covered by an AIXM 5.1. extension.

Coding example - Structure of message

<AIXMBasicMessage  ...>
  <aixm:messageMetadata>
  </aixm:messageMetadata>
  <hasMember>
    <aixm:AirportHeliport gml:id="uuid.0b7a2688-ab95-47e6-82c2-23fe321c4a48">
  </hasMember>
</AIXMBasicMessage>

Coding example - AerodromeReferencePoint (AirportHeliport property 'ARP')

  <hasMember>
    <aixm:AirportHeliport gml:id="uuid.0b7a2688-ab95-47e6-82c2-23fe321c4a48">
      <gml:identifier codeSpace="urn:uuid:">0b7a2688-ab95-47e6-82c2-23fe321c4a48</gml:identifier>
      <aixm:timeSlice>
        <aixm:AirportHeliportTimeSlice gml:id="uuid.a03a08d1-25f9-4e10-8447-8f8e4c6e2b12">
          <gml:validTime>
            <gml:TimePeriod gml:id="uuid.56b20da6-b580-44b1-a6b7-c46f889d0fec">
              <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.e6534f0e-5a48-45ff-85e2-e91237908fbc">
              <gml:beginPosition>2020-09-01T00:00:00Z</gml:beginPosition>
              <gml:endPosition indeterminatePosition="unknown" />
            </gml:TimePeriod>
          </aixm:featureLifetime>
          <aixm:designator>LKPR</aixm:designator>
          <aixm:name>PRAGUE AIRPORT</aixm:name>
          <aixm:locationIndicatorICAO>LKPR</aixm:locationIndicatorICAO>
          <aixm:designatorIATA>PRG</aixm:designatorIATA>
          <aixm:type>AD</aixm:type>
          <aixm:certifiedICAO>YES</aixm:certifiedICAO>
          <aixm:privateUse>NO</aixm:privateUse>
          <aixm:ARP>
            <aixm:ElevatedPoint gml:id="uuid.6225f9e9-3eaf-4416-b7d2-6279c4be4b71" srsName="urn:ogc:def:crs:EPSG::4326">
              <gml:pos>50.10083333 14.26</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:ARP>
        </aixm:AirportHeliportTimeSlice>
      </aixm:timeSlice>
    </aixm:AirportHeliport>
  </hasMember>

Table of properties of AerodromeReferencePoint

	ED-99/DO-272	AIXM 5.1	Contained within example
	AerodromeReferencePoint	AirportHeliport [Property ‘ARP’]	-
1	stfeat	featureLifetime.gml:TimePeriod.gml:beginPosition	yes
2	endfeat	featureLifetime.gml:TimePeriod.gml:endPosition	yes
3	stvalid	validTime.gml:TimePeriod.gml:beginPosition	yes
4	endvalid	validTime.gml:TimePeriod.gml:endPosition	yes
5	interp	interpretation	yes
6	feattype	Note: Can be implied	-
7	idnumber	identifier	yes
8	idarpt	locationIndicatorICAO	yes
9	iata	designatorIATA	yes
10	name	name	yes
11	vacc	ARP.ElevatedPoint.verticalAccuracy	yes
12	hacc	ARP.ElevatedPoint.horizontalAccuracy	yes
13	vres	ARP.ElevatedPoint.verticalResolution	no (part of AIXM extension)
14	hres	ARP.ElevatedPoint.horizontalResolution	no (part of AIXM extension)
15	source	source OR gmd:MD_Metadata.gmd:dataQualityInfo.gmd:lineage.gmd:LI_Lineage.gmd:processStep.gmd:LI_ProcessStep Note: Needs processor with a role set to "publisher".	yes
16	integr	integrity	no (part of AIXM extension)
17	revdate	revisionDate OR gmd:MD_Metadata.gmd:identificationInfo.gmd:MD_DataIdentification.gmd:citation.gmd:CI_Citation.gmd:date.gmd:CI_Date.gmd:date Note: Needs gmd:CI_Date.gmd:dateType.gmd:CI_DateTypeCode to be set to "revision"	yes
18	elev	fieldElevation	yes
19	systems	Not in scope of AIXM 5.1	no (part of AIXM extension)
20	mintelev	Not in scope of AIXM 5.1	no (part of AIXM extension)
21	maxtelev	Not in scope of AIXM 5.1	no (part of AIXM extension)
22	avgtelev	Not in scope of AIXM 5.1	no (part of AIXM extension)
23	devtelev	Not in scope of AIXM 5.1	no (part of AIXM extension)
24	maxtgrad	Not in scope of AIXM 5.1	no (part of AIXM extension)
25	devtgrad	Not in scope of AIXM 5.1	no (part of AIXM extension)
26	geopnt	ARP.ElevatedPoint	yes

Download feature AerodromeReferencePoint:

BL_ARP.xml

Missing attributes are part of the extension for the AIXM 5.1

https://ext.eurocontrol.int/aixm_confluence/display/AMX/Scope+of+AMX

AMXM

https://ext.eurocontrol.int/aixm_confluence/display/AMX/AerodromeReferencePoint

TBD

AerodromeReferencePoint encoding