v1.0.6

Blastpad encoding

Owned by WILSON Scott
Last updated: 2021 Mar 31

This section provides ‘Blastpad’ 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 Blastpad represents the surface placed adjacent to the end of the runway. Several point from the outer border of this surface 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 Blastpad is 'Polygon'. The definition of Point can be found in the Table A1-9 Data types of the Aeronautical Data Catalogue.

AMD encoding

AIXM 5.1

ED-99 feature Blastpad is mapped in the AIXM 5.1 as feature RunwayBlastPad.

Geometry

In the AIXM 5.1 the geometry of the feature RunwayBlastPad 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 : Blastpad

Time

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

AIXM 5.1 features

Blastpad is encoded to the AIXM 5.1 as feature RunwayBlastPad.

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

RunwayBlastPad feature

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

UML Diagram (Runway / RunwayBlastPad)

http://aixm.aero/sites/aixm.aero/files/imce/AIXM51HTML/AIXM/Diagram_RunwayBlastPad.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:RunwayBlastPad gml:id="uuid.a53ea72b-f14b-4236-96a3-4f31f6996006">
  </hasMember>
  <hasMember>
    <aixm:RunwayDirection gml:id="uuid.f3b6aa50-7cce-455e-b33b-9706289f7d14">
  </hasMember>
</AIXMBasicMessage>

Coding example - RunwayBlastPad

  <hasMember>
    <aixm:RunwayBlastPad gml:id="uuid.a53ea72b-f14b-4236-96a3-4f31f6996006">
      <gml:identifier codeSpace="urn:uuid:">a53ea72b-f14b-4236-96a3-4f31f6996006</gml:identifier>
      <aixm:timeSlice>
        <aixm:RunwayBlastPadTimeSlice gml:id="uuid.27fbb768-7553-412e-a66b-d7e78765afee">
          <gml:validTime>
            <gml:TimePeriod gml:id="uuid.ad22fb6d-d6da-4ce5-b6a2-f38ee1e7d404">
              <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.4712aefa-05de-404f-ae5f-ea70682aa4b9">
              <gml:beginPosition>2020-09-01T00:00:00Z</gml:beginPosition>
              <gml:endPosition indeterminatePosition="unknown" />
            </gml:TimePeriod>
          </aixm:featureLifetime>
          <aixm:usedRunwayDirection xlink:href="#f3b6aa50-7cce-455e-b33b-9706289f7d14" xlink:title="24" />
          <aixm:extent>
            <aixm:ElevatedSurface gml:id="uuid.e9426a86-dfd7-411b-8657-aaa7c1e23af9" srsName="urn:ogc:def:crs:EPSG::4326">
              <gml:patches>
                <gml:PolygonPatch>
                  <gml:exterior>
                    <gml:Ring>
                      <gml:curveMember>
                        <gml:Curve gml:id="uuid.02283f80-c7a3-43fa-9fe5-2f98b4bca01e">
                          <gml:segments>
                            <gml:GeodesicString interpolation="geodesic">
                              <gml:posList>50.11569881 14.27359253 50.11600507 14.27460528 50.11650707 14.27423748 50.11619931 14.27322507 50.11569881 14.27359253</gml:posList>
                            </gml:GeodesicString>
                          </gml:segments>
                        </gml:Curve>
                      </gml:curveMember>
                    </gml:Ring>
                  </gml:exterior>
                </gml:PolygonPatch>
              </gml:patches>
              <aixm:horizontalAccuracy uom="M">0.5</aixm:horizontalAccuracy>
              <aixm:elevation uom="M">376</aixm:elevation>
              <aixm:verticalAccuracy uom="M">0.5</aixm:verticalAccuracy>
            </aixm:ElevatedSurface>
          </aixm:extent>
        </aixm:RunwayBlastPadTimeSlice>
      </aixm:timeSlice>
    </aixm:RunwayBlastPad>
  </hasMember>


Download feature Blastpad:

BL_Blastpad.xml

 

 

 

Status: Published