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For the complete documentation index, see llms.txt. This page is also available as Markdown.

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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