gml:AbstractCurveSegment

A curve segment defines a homogeneous segment of a curve.
The attributes numDerivativesAtStart, numDerivativesAtEnd and numDerivativesInterior specify the type of continuity as specified in ISO 19107:2003, 6.4.9.3.
The AbstractCurveSegment element is the abstract head of the substituition group for all curve segment elements, i.e. continuous segments of the same interpolation mechanism.
All curve segments shall have an attribute interpolation with type gml:CurveInterpolationType specifying the curve interpolation mechanism used for this segment. This mechanism uses the control points and control parameters to determine the position of this curve segment.

Element information

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

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

Type: gml:AbstractCurveSegmentType

Properties: Global, Qualified, Abstract

Content

Empty content

Attributes

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

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:LineStringSegment
  - can be substituted with gml:ArcString
    - can be substituted with gml:Arc
      - can be substituted with gml:Circle
  - can be substituted with gml:ArcStringByBulge
    - can be substituted with gml:ArcByBulge
  - can be substituted with gml:ArcByCenterPoint
    - can be substituted with gml:CircleByCenterPoint
  - can be substituted with gml:CubicSpline
  - can be substituted with gml:BSpline
    - can be substituted with gml:Bezier
  - can be substituted with gml:OffsetCurve
  - can be substituted with gml:Clothoid
  - can be substituted with gml:GeodesicString
    - can be substituted with gml:Geodesic