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LinearReference

Schema for linear referencing.
Schema for linear referencing.

The linearReference data type will be used where required to record interaction over a length of a WatercourseLink. For example, linear interactions could be used to record where the water network passes under the bridge for a distance at A, over a weir at B or has an associated fish pass at an offset at C.

Screenshot of OS MasterMap Water Network Layer showing three examples of watercourse interactions, labelled A, B and C in red text. Point A marks where the water network passes under a bridge for a distance; Point B marks where the water network passes over a weir for a distance, and Point C marks where the water network has an associated fish ladder at an offset for a distance.
Examples of watercourseInteractions which could be modelled through linear referencing.

Where a linear interaction applies to two or more links, then each part of the interaction is recorded by means of more than one networkReference property.

LinearReference attributes

Reference to a part of a WatercourseLink along which a specific property applies.

  • Subtype of: SimpleLinearReference

fromPositionGeometry

Point geometry to explicitly locate the start location from which the property applies.

  • Attribute name: fromPositionGeometry

  • Type: GM_Point

  • Multiplicity: [1]

toPositionGeometry

Point geometry to explicitly locate the end location to which the property applies.

  • Attribute name: toPositionGeometry

  • Type: GM_Point

  • Multiplicity: [1]

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