Coordinate positioning

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Systems of this kind are based on the concept of Geometrical coordinates.

It could either be a projected X, Y, Z coordinate, a λ, ϕ, h geodetic coordinate or even an X, Y(, Z) schematic plan coordinate.
It could be read as “at coordinate X, Y, Z in the system [EPSG:xxxxx] [01/06/2014]4” [4: The exact content of the definition string of the geometric system is not yet definitve]
The model integrates a link between the linear positioning system and the intrinsic positioning system. It supports the "conversion" of an element position associated with a number between 0 and 1 to a kilometric point on its reference system.

An example of an aggregation mechanism is depicted in Annex B. The classes, used to define the location and positioning systems, are:

  • PositioningSystem: This class defines the general concept of a Reference System.
  • LinearPositioningSystem: This class defines a Linear Referencing System. It defines a starting and an ending coordinate.
  • LinearAnchorPoints: this class describes the reference points in the linear reference system (Milestones, anomaly points…) and their characteristics.
  • LinearCoordinate: This class defines the localization expressed in a Linear Reference System (LRS).
  • GeometricPositioningSystem: This class defines a Geometrical Reference System, so it allows to localise a resource with his geometrical coordinates (x, y, z or λ, ϕ, h).
  • GeometricCoordinate: This class defines the localization expressed in a geometrical (or geographical) Reference System, so it defines the coordinates (x, y, z or λ, ϕ, h).
  • PositioningSystemCoordinate: This class represent a coordinate in either a geometric or linear reference system.
  • IntrinsicCoordinate: This class allows associating an intrinsic coordinate to another coordinate, either geographic or linear.
  • AssociatedPositioningSystem: This class allows to group couples of coordinates to define the translation parameters between an external (geometric or linear) coordinate system and the element’s intrinsic coordinate system.

What you should have learned

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Positioning - Track-referred positioning