46 Copyright © 2012 Open Geospatial Consortium
Methods that allow offsets. Allowable values are specified by the gmllro:VerticalOffsetDirectionType codelist. The default value is up.
9.5.4 LRMWithOffsetPropertyType
complexType name=LRMWithOffsetPropertyType sequence minOccurs=0
element ref=gmllro:LRMWithOffset sequence
attributeGroup ref=gml:AssociationAttributeGroup complexType
A property that has a LRM With Offset as its value domain may either be an appropriate LRM With Offset encapsulated in an element of this type or an XLink reference to a remote LRM With Offset where remote
includes LRMs With Offset located elsewhere in the same document. Either the reference or the contained element shall be given, but neither both nor none.
9.5.5 LateralOffsetDistanceExpressionType
complexType name=LateralOffsetDistanceExpressionType complexContent
extension base=gmllr:DistanceExpressionType sequence
element name=lateralOffsetExpression type=gmllro:LateralOffsetExpressionType minOccurs=0
element name=verticalOffsetExpression type=gmllro:VerticalOffsetExpressionType minOccurs=0
sequence extension
complexContent complexType
element name=LateralOffsetDistanceExpression type=gmllro:LateralOffsetDistanceExpressionType
substitutionGroup=gmllr:DistanceExpression gmllro:LateralOffsetDistanceExpressionType
implements ISO 19148 LRO_LateralOffsetDistanceExpression see ISODIS 19148, 6.4.5.
A gmllro:LateralOffsetDistanceExpressionType specifies a linear referenced measure value which may contain a lateral offset value. It extends the gmllr:DistanceExpressionType with lateral offsets.
Lateral offsets extend the definition of a position expression to accommodate locations which do not lie directly on the linear element, but instead are located some distance horizontally or vertically or both from
the linear element. The horizontal and vertical distances are measured along a perpendicular from the linear element or from an offset referent.
The optional element gmllro:lateralOffsetExpression specifies the laterally offset distance of the distance expression. If absent, the position is not displaced laterally left or right of the
gmllr:LinearElement. A lateral offset expression is only appropriate if the Linear Referencing Method allows lateral offsets.
The optional element gmllro:verticalOffsetExpression specifies the vertically offset distance of the distance expression. If absent, the position is not displaced vertically above or below the
gmllr:LinearElement. A vertical offset expression is only appropriate if the Linear Referencing Method allows vertical offsets.
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9.5.6 LateralOffsetExpressionType
