org.deegree.model.geometry
Interface GM_SurfacePatch

All Superinterfaces:

GM_GenericSurface

All Known Subinterfaces:

GM_Polygon

All Known Implementing Classes:

GM_Polygon_Impl

public interface GM_SurfacePatch

extends GM_GenericSurface

Defining the iso geometry GM_SurfacePatch which is used for building surfaces. A surface patch is made of one exterior ring and 0..n interior rings. By definition there can't be a surface patch with no exterior ring. A polygon is a specialized surface patch. -----------------------------------------------------

Version:

$Revision: 1.3 $ $Date: 2004/02/09 07:57:02 $

Author:

Andreas Poth

Method Summary

boolean	contains(GM_Object gmo) The Boolean valued operation "contains" shall return TRUE if this GM_Object contains another GM_Object.
double	getArea() The operation "area" shall return the area of this GM_GenericSurface.
GM_Point	getCentroid() The operation "centroid" shall return the mathematical centroid for this GM_Object.
CS_CoordinateSystem	getCoordinateSystem() returns the coordinate system of the surface patch
GM_Position[]	getExteriorRing() returns the exterior ring of the surface
GM_Position[][]	getInteriorRings() returns the interior rings of the surface
GM_SurfaceInterpolation	getInterpolation() The interpolation determines the surface interpolation mechanism used for this GM_SurfacePatch.
boolean	intersects(GM_Object gmo) The Boolean valued operation "intersects" shall return TRUE if this GM_Object intersects another GM_Object.

Methods inherited from interface org.deegree.model.geometry.GM_GenericSurface

getEnvelope, getPerimeter

Method Detail

getInterpolation

public GM_SurfaceInterpolation getInterpolation()

The interpolation determines the surface interpolation mechanism used for this GM_SurfacePatch. This mechanism uses the control points and control parameters defined in the various subclasses to determine the position of this GM_ SurfacePatch.

getExteriorRing

public GM_Position[] getExteriorRing()

returns the exterior ring of the surface

getInteriorRings

public GM_Position[][] getInteriorRings()

returns the interior rings of the surface

getCoordinateSystem

public CS_CoordinateSystem getCoordinateSystem()

returns the coordinate system of the surface patch

intersects

public boolean intersects(GM_Object gmo)

The Boolean valued operation "intersects" shall return TRUE if this GM_Object intersects another GM_Object. Within a GM_Complex, the GM_Primitives do not intersect one another. In general, topologically structured data uses shared geometric objects to capture intersection information.

contains

public boolean contains(GM_Object gmo)

The Boolean valued operation "contains" shall return TRUE if this GM_Object contains another GM_Object.

getCentroid

public GM_Point getCentroid()

The operation "centroid" shall return the mathematical centroid for this GM_Object. The result is not guaranteed to be on the object.

getArea

public double getArea()

The operation "area" shall return the area of this GM_GenericSurface. The area of a 2 dimensional geometric object shall be a numeric measure of its surface area Since area is an accumulation (integral) of the product of two distances, its return value shall be in a unit of measure appropriate for measuring distances squared.

Specified by:

getArea in interface GM_GenericSurface