gml:OffsetCurve

An offset curve is a curve at a constant distance from the basis curve. offsetBase is the base curve from which this curve is defined as an offset. distance and refDirection have the same meaning as specified in ISO 19107:2003, 6.4.23.
The content model follows the general pattern for the encoding of curve segments.

Element information

Namespace: http://www.opengis.net/gml/3.2

Schema document: external/ogc/gml/3.2.1/geometryPrimitives.xsd

Type: gml:OffsetCurveType

Properties: Global, Qualified

Content

Sequence [1..1]
1. gml:offsetBase [1..1]
2. gml:distance [1..1]
3. gml:refDirection [0..1]

Attributes

Name	Occ	Type	Notes
numDerivativesAtStart	[0..1]	xsd:integer	Default value is "0". from type gml:AbstractCurveSegmentType
numDerivativesAtEnd	[0..1]	xsd:integer	Default value is "0". from type gml:AbstractCurveSegmentType
numDerivativeInterior	[0..1]	xsd:integer	Default value is "0". from type gml:AbstractCurveSegmentType

Used in

Type gml:ArrayAssociationType (Element gml:members)
Type gml:CurveSegmentArrayPropertyType (Element gml:segments)

Substitution hierarchy

gml:AbstractObject
- can be substituted with gml:AbstractCurveSegment
  - can be substituted with gml:OffsetCurve

Sample instance

<gml:OffsetCurve>
   <gml:offsetBase>
      <gml:LineString gml:id="ID">
         <gml:metaDataProperty>...
         </gml:metaDataProperty>
         <gml:description>string</gml:description>
         <gml:descriptionReference/>
         <gml:identifier codeSpace="http://www.example.com/">string</gml:identifier>
         <gml:name>string</gml:name>
         <gml:pos>1.0 1.0</gml:pos>
      </gml:LineString>
   </gml:offsetBase>
   <gml:distance uom="">1.0</gml:distance>
   <gml:refDirection>1.0 1.0</gml:refDirection>
</gml:OffsetCurve>