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Excerpt
This section provides ‘Survey Control Point’ feature data encoding guidance.

Table of Contents

Vocabulary

	ED-99	ED-119/AMXM	AIXM 5.1	AIRM
Name	SurveyControlPoint	AM_SurveyControlPoint	SurveyControlPoint	SurveyControlPoint

Data concept:

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

Data concepts indicate the reference features and properties for service architects, 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 SurveyControlPoint represents a monumented survey control point or a surveying reference point. 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 SurveyControlPoint is 'Point'. The definition of geometry type Point can be found in the Table A1-9 Data types of the Aeronautical Data Catalogue.

AMD encoding

AIXM 5.1

SurveyControlPoint is mapped to the AIXM 5.1 as feature SurveyControlPoint.

Geometry

In the AIXM 5.1 the geometry of the SurveyControlPoint 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 location shall be transferred into a GML geometry object Point.

Figure 1 : SurveyControlPoint

Time

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

AIXM 5.1 features

SurveyControlPoint is encoded to the AIXM 5.1 as single feature SurveyControlPoint.

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

SurveyControlPoint

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

UML Diagram (Airport Heliport)

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

Info

title	Content of example

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

Code Block

language	xml

<AIXMBasicMessage  ...>
  <aixm:messageMetadata>
  </aixm:messageMetadata>
  <hasMember>
    <aixm:AirportHeliport gml:id="uuid.0b7a2688-ab95-47e6-82c2-23fe321c4a48">
  </hasMember>
  <hasMember>
    <aixm:SurveyControlPoint gml:id="uuid.a5d6839b-155f-480f-add2-5fcf4ac5a87e">
  </hasMember>
</AIXMBasicMessage>

Coding example - SurveyControlPoint

Code Block

language	xml

  <hasMember>
    <aixm:SurveyControlPoint gml:id="uuid.a5d6839b-155f-480f-add2-5fcf4ac5a87e">
      <gml:identifier codeSpace="urn:uuid:">a5d6839b-155f-480f-add2-5fcf4ac5a87e</gml:identifier>
      <aixm:timeSlice>
        <aixm:SurveyControlPointTimeSlice gml:id="uuid.703d775c-e2b9-4ec7-bb09-cfa9434e1a1e">
          <gml:validTime>
            <gml:TimePeriod gml:id="uuid.10559e54-05d6-4fda-8ef8-227d18940492">
              <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.41b4899c-0271-4338-bbe0-73cec9d9e909">
              <gml:beginPosition>2020-09-01T00:00:00Z</gml:beginPosition>
              <gml:endPosition indeterminatePosition="unknown" />
            </gml:TimePeriod>
          </aixm:featureLifetime>
          <aixm:designator>TB1</aixm:designator>
          <aixm:associatedAirportHeliport xlink:href="#0b7a2688-ab95-47e6-82c2-23fe321c4a48" xlink:title="LKPR" />
          <aixm:location>
            <aixm:ElevatedPoint gml:id="uuid.f2771a7a-2a99-4c72-a953-30a29fedcb19" srsName="urn:ogc:def:crs:EPSG::4326">
              <gml:pos>50.09110236 14.2532335</gml:pos>
              <aixm:horizontalAccuracy uom="M">0.1</aixm:horizontalAccuracy>
              <aixm:elevation uom="M">365</aixm:elevation>
              <aixm:verticalDatum>AHD</aixm:verticalDatum>
              <aixm:verticalAccuracy uom="M">0.1</aixm:verticalAccuracy>
            </aixm:ElevatedPoint>
          </aixm:location>
          <aixm:annotation>
            <aixm:Note gml:id="uuid.9dc5620e-bcda-4caf-8977-2855655b4892">
			  <aixm:propertyName>location</aixm:propertyName>
              <aixm:purpose>DESCRIPTION</aixm:purpose>
              <aixm:translatedNote>
                <aixm:LinguisticNote gml:id="uuid.58cb46ef-955e-40ef-b475-0bb56d4d13e9">
                  <aixm:note>published/rounded value for a survey control point, as opposed to the surveyed value that is modelled by geopnt</aixm:note>
                </aixm:LinguisticNote>
              </aixm:translatedNote>
            </aixm:Note>
          </aixm:annotation>
        </aixm:SurveyControlPointTimeSlice>
      </aixm:timeSlice>
    </aixm:SurveyControlPoint>
  </hasMember>

Table of properties of SurveyControlPoint

ED-99/DO-272AIXM 5.1Contained within example

AM_SurveyControlPoint

SurveyControlPoint

-

1stfeatfeatureLifetime.gml:TimePeriod.gml:beginPositionyes2endfeatfeatureLifetime.gml:TimePeriod.gml:endPositionyes3stvalidvalidTime.gml:TimePeriod.gml:beginPosition

yes

4endvalidvalidTime.gml:TimePeriod.gml:endPositionyes5interpinterpretationyes6

feattype

Note: Can be implied

-7idnumberidentifieryes8

idarpt

associatedAirportHeliport.AirportHeliport.locationIndicatorICAO

yes9

idsurv

designator

yes10

vacc

location.ElevatedPoint.verticalAccuracy

yes11

hacc

location.ElevatedPoint.horizontalAccuracy

yes12

vres

location.ElevatedPoint.verticalResolution

no (part of AIXM extension)13

hres

location.ElevatedPoint.horizontalResolution

no (part of AIXM extension)14

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".

yes15

integr

integrity

no (part of AIXM extension)16

revdate

revisionDate
OR
gmd:MD_Metadata.gmd:identificationInfo.gmd:MD_DataIdentification.gmd:citation.gmd:CI_Citation.gmd:date.gmd:CI_Date.gmd:date
Note: also needs gmd:CI_Date.gmd:dateType.gmd:CI_DateTypeCode to be set to "revision"

yes17

coord

annotation.Note[propertName='location', purpose='DESCRIPTION'].translatedNote.LinguisticNote.note

yes18hdatum

Note: calculated from CRS on referencePoint.ElevatedPoint

-19

vdatum

referencePoint.ElevatedPoint.verticalDatum

yes20

spheroid

Note: calculated from CRS on referencePoint.ElevatedPoint

-21project

Note: calculated from CRS on referencePoint.ElevatedPoint

-22geopnt

location.ElevatedPoint

yes

Download feature SurveyControlPoint:

BL_SurveyControlPoint.xml

AMXM

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

TBD

Version	Old Version 7	New Version 8
Changes made by	WILSON Scott	WILSON Scott
Saved on	2021 Mar 30	2021 Mar 30

Versions Compared

Key

Vocabulary

General

AMD encoding

AIXM 5.1

Geometry

GML considerations:

Time

AIXM 5.1 features

AMXM