land:ObservationGroup

All observations to the same point in a group should be averaged together (they have consistant orientation)

Element information

Namespace: http://www.landxml.org/schema/LandXML-1.1

Schema document: external/landxml/1.1/LandXML-1.1.xsd

Type: Anonymous

Properties: Global, Qualified

Content

Sequence [1..1]
1. land:TargetPoint [0..1] Represents a 2D or 3D location for the targetIt is defined by either a coordinate text value ("north east" or "north east elev") or a CgPoint number reference "pntRef" attribute.
2. Choice [0..*]
  - land:Backsight
  - land:RawObservation [1..*]
  - land:ReducedObservation This has been modified to include new fields such as accuracy, date, class and adoption. I've added in bearing (azimuth is in terms of true north whereas bearing is the projection north) - maybe this doesn't matter, may need to discuss
  - RedHorizontalPosition [0..1] This element is used to define the Reduced Horizontal Position. The coordinates given in Geographical Coordinates may come in variety of means.
  - land:ReducedArcObservation [0..1] As we discussed this element is used to provide measured information for calculating boundary arcs. The definition information required is quite different to the curve element
  - RedVerticalObservation [0..*] This element is used to define the Reduced Verticall Position. The coordinates given in Geographical Coordinates may come in variety of means.
  - land:FieldNote [0..*] Place the note as a text value between the FieldNote element tags. You may also place any valid XML structure inside this tag.
  - land:Feature [0..*] Used to include additional information that is not explicitly defined by the LandXML schema, Feature may contain one or more Property, DocFileRef or nested Feature elements. NOTE: to allow any valid content, the explicit definitions for Property, DocFileRef and Feature have been commented out, but are still expected in common use.Each Property element defines one piece of data.

Attributes

Name	Occ	Type
id	[1..1]	xsd:ID
purpose	[0..1]	land:purposeType
setupID	[0..1]	xsd:IDREF
targetSetupID	[0..1]	xsd:IDREF
setID	[0..1]	xsd:anySimpleType
coordGeomRefs	[0..1]	land:coordGeomNameRefs

Used in

Anonymous type of element land:ControlChecks
Anonymous type of element land:InstrumentSetup
Anonymous type of element land:Survey

Sample instance

<land:ObservationGroup id="ID">
   <land:TargetPoint>Any text, intermingled with:1.0 1.0</land:TargetPoint>
   <land:Backsight id="ID" circle="1.0">
      <land:BacksightPoint>Any text, intermingled with:1.0 1.0</land:BacksightPoint>
      <land:FieldNote>Any text, intermingled with:
         <!--any element-->
      </land:FieldNote>
   </land:Backsight>
</land:ObservationGroup>