org.opengis.geometry.coordinate

Interface LineSegment

All Superinterfaces:

CurveSegment, GenericCurve, LineString

@UML(identifier="GM_LineSegment",
     specification=ISO_19107)
public interface LineSegment
extends LineString

Two distinct direct positions (the start point and end point) joined by a straight line. Thus its interpolation attribute shall be LINEAR. The default parameterization is:

 L = endParam - startParam
 c(s) = ControlPoint[1]+((s-startParam)/L)*(ControlPoint[2]-ControlPoint[1])
 

Any other point in the control point array must fall on this line. The control points of a LineSegment shall all lie on the straight line between its start point and end point. Between these two points, other positions may be interpolated linearly. The linear interpolation, given using a constructive parameter t, 0 ? t ? 1.0, where c(o) = c.startPoint and c(1)=c.endPoint, is:

c(t) = c(0)(1-t) + c(1)t

Since:

GeoAPI 1.0

Author:

Martin Desruisseaux (IRD)

See Also:

GeometryFactory.createLineSegment(org.opengis.geometry.coordinate.Position, org.opengis.geometry.coordinate.Position)

Method Summary

Methods inherited from interface LineString

asLineSegments, getControlPoints

Methods inherited from interface CurveSegment

getBoundary, getCurve, getInterpolation, getNumDerivativesAtEnd, getNumDerivativesAtStart, getNumDerivativesInterior, getSamplePoints, reverse

Methods inherited from interface GenericCurve

asLineString, forConstructiveParam, forParam, getEndConstructiveParam, getEndParam, getEndPoint, getParamForPoint, getStartConstructiveParam, getStartParam, getStartPoint, getTangent, length, length