org.opengis.geometry.aggregate

Interface MultiSurface

All Superinterfaces:

Aggregate, Geometry, MultiPrimitive, TransfiniteSet

@UML(identifier="GM_MultiSurface",
     specification=ISO_19107)
public interface MultiSurface
extends MultiPrimitive

An aggregate class containing only instances of OrientableSurface. The association role element shall be the set of orientable surfaces contained in this MultiSurface.

Since:

GeoAPI 2.1

Author:

Sanjay Jena, Prof. Dr. Jackson Roehrig

Method Summary

Modifier and Type	Method and Description
double	getArea() Returns the accumulated area of all orientable surfaces contained in this MultiSurface.
Set<OrientableSurface>	getElements() Returns the set containing the orientable surfaces that compose this MultiSurface.

Methods inherited from interface Geometry

clone, distance, getBoundary, getBuffer, getCentroid, getClosure, getConvexHull, getCoordinateDimension, getCoordinateReferenceSystem, getDimension, getEnvelope, getMaximalComplex, getMbRegion, getPrecision, getRepresentativePoint, isCycle, isMutable, isSimple, toImmutable, transform, transform

Methods inherited from interface TransfiniteSet

contains, contains, difference, equals, intersection, intersects, symmetricDifference, union

Method Detail

getElements

@UML(identifier="element",
     obligation=MANDATORY,
     specification=ISO_19107)
Set<OrientableSurface> getElements()

Returns the set containing the orientable surfaces that compose this MultiSurface. The set may be modified if this geometry is mutable.

Specified by:

getElements in interface Aggregate

Specified by:

getElements in interface MultiPrimitive

Returns:

The set containing the elements that compose this aggregate.

getArea

@UML(identifier="area",
     obligation=MANDATORY,
     specification=ISO_19107)
double getArea()

Returns the accumulated area of all orientable surfaces contained in this MultiSurface. The area of a 2-dimensional geometric object shall be a numeric measure of its surface area (in a square unit of distance). 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, such as meters squared (m²).

NOTE: Consistent with the definition of surface as a set of direct positions, holes in the surfaces will not contribute to the total area. If the usual Green's Theorem (or more general Stokes' Theorem) integral is used, the integral around the holes in the surface are subtracted from the integral about the exterior of the surface patch.

Returns:

The area.