This section provides ‘Stopway’ feature data encoding guidance.

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 Stopway is area with exact boundaries. Several points from the border of the Stopway shall be measured. The key attributes are the longitude, latitude and the elevation in reference with WGS-84 of each measured point. 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 Stopway is 'Polygon'. The definition of Polygon can be found in the Table A1-9 Data types of the Aeronautical Data Catalogue.

AMD encoding

AIXM 5.1

Stopway is mapped to the AIXM 5.1 as feature RunwayProtectArea with property 'Type' set to "STOPWAY".

Geometry

In the AIXM 5.1 the geometry of the RunwayProtectArea is polygon encoded as object ElevatedSurface.

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 PolygonPatch.

Figure 1 : Stopway

Time

Feature RunwayProtectArea shall be established in accordance with coding rules and requirements listed in AIXM 5.1 Temporality Model.

AIXM 5.1 features

RunwayProtectArea is encoded to the AIXM 5.1 as feature RunwayProtectArea with Property Type set to "STOPWAY".

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

RunwayProtectArea feature

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

UML Diagram (Runway/RunwayProtection)

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

Content of example

This is a ficticious example. No feature was present at the aerodrome used.

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

<AIXMBasicMessage  ...>
  <aixm:messageMetadata>
  </aixm:messageMetadata>
  <hasMember>
    <aixm:AirportHeliport gml:id="uuid.0b7a2688-ab95-47e6-82c2-23fe321c4a48">
  </hasMember>
  <hasMember>
    <aixm:Runway gml:id="uuid.3f4952ee-a237-47d9-ab33-23f46a6332b1">
  </hasMember>
  <hasMember>
    <aixm:RunwayDirection gml:id="uuid.f3b6aa50-7cce-455e-b33b-9706289f7d14">
  </hasMember>
  <hasMember>
    <aixm:RunwayProtectArea gml:id="uuid.ae0cb7c5-10ea-4fae-9cc4-dabe13159cd8">
  </hasMember>
</AIXMBasicMessage>

Coding example - Stopway

  <hasMember>
    <aixm:RunwayProtectArea gml:id="uuid.ae0cb7c5-10ea-4fae-9cc4-dabe13159cd8">
      <gml:identifier codeSpace="urn:uuid:">ae0cb7c5-10ea-4fae-9cc4-dabe13159cd8</gml:identifier>
      <aixm:timeSlice>
        <aixm:RunwayProtectAreaTimeSlice gml:id="uuid.f1a1965e-85ac-4b0a-9ba8-1ebcc7ca77e7">
          <gml:validTime>
            <gml:TimePeriod gml:id="uuid.136fc494-9c1f-4c36-b609-329467e1de31">
              <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.b8d07dfe-6800-4cf3-98c9-37ca0a0fe515">
              <gml:beginPosition>2020-09-01T00:00:00Z</gml:beginPosition>
              <gml:endPosition indeterminatePosition="unknown" />
            </gml:TimePeriod>
          </aixm:featureLifetime>
          <aixm:surfaceProperties>
            <aixm:SurfaceCharacteristics gml:id="uuid.d7b4b641-3c2f-4156-859a-7105534689d1">
              <aixm:composition>CONC</aixm:composition>
              <aixm:preparation>GROOVED</aixm:preparation>
            </aixm:SurfaceCharacteristics>
          </aixm:surfaceProperties>
          <aixm:extent>
            <aixm:ElevatedSurface gml:id="uuid.7382b711-b16e-43ea-b278-fd8e23224b16" srsName="urn:ogc:def:crs:EPSG::4326">
              <gml:patches>
                <gml:PolygonPatch>
                  <gml:exterior>
                    <gml:Ring>
                      <gml:curveMember>
                        <gml:Curve gml:id="uuid.72cbe7ba-0d91-4b47-8121-7c00c523369e">
                          <gml:segments>
                            <gml:GeodesicString interpolation="geodesic">
                              <gml:posList>50.11619931 14.27322507 50.11569881 14.27359253 50.11600507 14.27460528 50.11650707 14.27423748 50.11619931 14.27322507</gml:posList>
                            </gml:GeodesicString>
                          </gml:segments>
                        </gml:Curve>
                      </gml:curveMember>
                    </gml:Ring>
                  </gml:exterior>
                </gml:PolygonPatch>
              </gml:patches>
              <aixm:horizontalAccuracy uom="M">1</aixm:horizontalAccuracy>
              <aixm:elevation uom="M">376</aixm:elevation>
              <aixm:verticalAccuracy uom="M">1</aixm:verticalAccuracy>
            </aixm:ElevatedSurface>
          </aixm:extent>
          <aixm:type>STOPWAY</aixm:type>
          <aixm:status>NORMAL</aixm:status>
          <aixm:protectedRunwayDirection xlink:href="#f3b6aa50-7cce-455e-b33b-9706289f7d14" xlink:title="24" />
        </aixm:RunwayProtectAreaTimeSlice>
      </aixm:timeSlice>
    </aixm:RunwayProtectArea>
  </hasMember>

Download feature Stopway:

BL_Stopway.xml

Browser not supported