Package org.opengis.geometry.coordinate

Set of geometric objects. The following is adapted from Feature Geometry (Topic 1) specification.

A geometric object shall be a combination of a coordinate geometry and a coordinate reference system. In all of the operations, all geometric calculations shall be done in the coordinate reference system of the first geometric object accessed, which is normally the object whose operation is being invoked. Returned objects shall be in the coordinate reference system in which the calculations are done unless explicitly stated otherwise. The interface defined in this package are basically those of set theory. In general a geometric object is a set of geometric points, represented by DirectPosition. Object instantiations of geometric objects are Geometry. Object instantiations of geometric points, when used as values, are DirectPositions. General set theory operations defined at Geometry differentiate further down the class hierarchy depending on whether or not the boundary DirectPosition are included as set elements. Subtypes of Primitive do not contain boundary points, while subtypes of Complex do.

Interface Summary

Interface	Description
AffinePlacement	A placement defined by linear transformation from the parameter space to the target coordinate space.
Arc	Arc of the circle determined by 3 points, starting at the first, passing through the second and terminating at the third.
ArcByBulge	Equivalents to the Arc, except the bulge representation is maintained.
ArcString	Similar to a line string except that the interpolation is by circular arcs.
ArcStringByBulge	A variant of the arc that stores the parameters of the second constructor of the component arcs and recalculates the other attributes of the standard arc.
Bezier	Polynomial splines that use Bezier or Bernstein polynomials for interpolation purposes.
BicubicGrid	A gridded surface that uses cubic polynomial splines as the horizontal and vertical curves.
BilinearGrid	A gridded surface that uses line strings as the horizontal and vertical curves.
BSplineCurve	A piecewise parametric polynomial or rational curve described in terms of control points and basis functions.
BSplineSurface	A rational or polynomial parametric surface that is represented by control points, basis functions and possibly weights.
Circle	Same as an arc, but closed to form a full circle.
Clothoid	The clothoid (or Cornu's spiral), a plane curve whose curvature is a fixed function of its length.
Cone	A gridded surface given as a family of conic sections whose control points vary linearly.
Conic	Any general conic curve.
CubicSpline	Cubic splines.
Cylinder	A gridded surface given as a family of circles whose positions vary along a set of parallel lines, keeping the cross sectional horizontal curves of a constant shape.
GenericCurve	Common interface for curve and curve segment.
GenericSurface	Common interface for surface and surface patch.
Geodesic	Two distinct positions joined by a geodesic curve.
GeodesicString	Sequence of geodesic segments.
GeometryFactory	A factory of geometries.
GriddedSurface	A parametric curve surface defined from a rectangular grid in the parameter space.
Knot	Controls the constructive parameter space for spline curves and surfaces.
LineSegment	Two distinct direct positions (the start point and end point) joined by a straight line.
LineString	A sequence of line segments, each having a parameterization like the one LineSegment.
OffsetCurve	A curve at a constant distance from the basis curve.
ParametricCurveSurface	The surface patches that make up the parametric curve surfaces.
ParamForPoint	The curve parameter for a point.
Placement	Takes a standard geometric construction and places it in geographic space.
PointArray	A sequence of points.
PointGrid	A grid of points.
Polygon	A surface patch that is defined by a set of boundary curves and an underlying surface to which these curves adhere.
PolyhedralSurface	A surface composed of polygon surfaces connected along their common boundary curves.
PolynomialSpline	A polynimal spline.
Position	A type consisting of either a direct position or of a point from which a direct position shall be obtained.
Sphere	A gridded surface given as a family of circles whose positions vary linearly along the axis of the sphere, and whose radius varies in proportion to the cosine function of the central angle.
SplineCurve	Root for subtypes of curve segment using some version of spline, either polynomial or rational functions.
Tin	A triangulated surface that uses the Delaunay algorithm or a similar algorithm complemented with consideration for breaklines, stoplines and maximum length of triangle sides.
Triangle	A planar polygon defined by 3 corners.
TriangulatedSurface	A polyhedral surface that is composed only of triangles.

Class Summary

Class	Description
BSplineSurfaceForm	Indicates a particular geometric form represented by a BSplineSurface.
KnotType	The type of a B-spline.
SplineCurveForm	Indicates which sort of curve may be approximated by a particular B-spline.