gml:Clothoid

A clothoid, or Cornu's spiral, is plane curve whose curvature is a fixed function of its length.
refLocation, startParameter, endParameter and scaleFactor have the same meaning as specified in ISO 19107:2003, 6.4.22.
interpolation is fixed as "clothoid".
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:ClothoidType

Properties: Global, Qualified

Content

Sequence [1..1]
1. gml:refLocation [1..1]
2. gml:scaleFactor [1..1]
3. gml:startParameter [1..1]
4. gml:endParameter [1..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
interpolation	[0..1]	gml:CurveInterpolationType	Fixed value is "clothoid".

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:Clothoid

Sample instance

<gml:Clothoid>
   <gml:refLocation>
      <gml:AffinePlacement>
         <gml:location>1.0 1.0</gml:location>
         <gml:refDirection>1.0 1.0</gml:refDirection>
         <gml:inDimension>1</gml:inDimension>
         <gml:outDimension>1</gml:outDimension>
      </gml:AffinePlacement>
   </gml:refLocation>
   <gml:scaleFactor>1.0</gml:scaleFactor>
   <gml:startParameter>1.0</gml:startParameter>
   <gml:endParameter>1.0</gml:endParameter>
</gml:Clothoid>