com.vividsolutions.jts.geom
Class MultiPolygon

java.lang.Object
  com.vividsolutions.jts.geom.Geometry
      com.vividsolutions.jts.geom.GeometryCollection
          com.vividsolutions.jts.geom.MultiPolygon

All Implemented Interfaces:

Polygonal, java.io.Serializable, java.lang.Cloneable, java.lang.Comparable

public class MultiPolygon
extends GeometryCollection
implements Polygonal

Models a collection of Polygons.

As per the OGC SFS specification, the Polygons in a MultiPolygon may not overlap, and may only touch at single points. This allows the topological point-set semantics to be well-defined.

Version:

1.7

See Also:

Serialized Form

Field Summary

Fields inherited from class com.vividsolutions.jts.geom.GeometryCollection

geometries

Fields inherited from class com.vividsolutions.jts.geom.Geometry

envelope, factory, SRID

Constructor Summary

MultiPolygon(Polygon[] polygons, GeometryFactory factory)

MultiPolygon(Polygon[] polygons, PrecisionModel precisionModel, int SRID)
Deprecated. Use GeometryFactory instead

Method Summary

boolean	equalsExact(Geometry other, double tolerance) Returns true if the two Geometrys are exactly equal, up to a specified distance tolerance.
Geometry	getBoundary() Computes the boundary of this geometry
int	getBoundaryDimension() Returns the dimension of this Geometrys inherent boundary.
int	getDimension() Returns the dimension of this geometry.
java.lang.String	getGeometryType() Returns the name of this object's com.vivid.jts.geom interface.
boolean	isSimple() Tests whether this Geometry is simple.
Geometry	reverse() Creates a MultiPolygon with every component reversed.

Methods inherited from class com.vividsolutions.jts.geom.GeometryCollection

apply, apply, apply, apply, clone, compareToSameClass, compareToSameClass, computeEnvelopeInternal, getArea, getCoordinate, getCoordinates, getGeometryN, getLength, getNumGeometries, getNumPoints, isEmpty, normalize

Methods inherited from class com.vividsolutions.jts.geom.Geometry

buffer, buffer, buffer, checkNotGeometryCollection, compare, compareTo, compareTo, contains, convexHull, coveredBy, covers, crosses, difference, disjoint, distance, equal, equals, equals, equalsExact, equalsNorm, equalsTopo, geometryChanged, geometryChangedAction, getCentroid, getEnvelope, getEnvelopeInternal, getFactory, getInteriorPoint, getPrecisionModel, getSRID, getUserData, hashCode, hasNonEmptyElements, hasNullElements, intersection, intersects, isEquivalentClass, isGeometryCollection, isRectangle, isValid, isWithinDistance, norm, overlaps, relate, relate, setSRID, setUserData, symDifference, toString, toText, touches, union, union, within

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

MultiPolygon

public MultiPolygon(Polygon[] polygons,
                    PrecisionModel precisionModel,
                    int SRID)

Deprecated. Use GeometryFactory instead

Constructs a MultiPolygon.

Parameters:

polygons - the Polygons for this MultiPolygon , or null or an empty array to create the empty geometry. Elements may be empty Polygons, but not null s. The polygons must conform to the assertions specified in the OpenGIS Simple Features Specification for SQL .

precisionModel - the specification of the grid of allowable points for this MultiPolygon

SRID - the ID of the Spatial Reference System used by this MultiPolygon

MultiPolygon

public MultiPolygon(Polygon[] polygons,
                    GeometryFactory factory)

Parameters:

polygons - the Polygons for this MultiPolygon, or null or an empty array to create the empty geometry. Elements may be empty Polygons, but not nulls. The polygons must conform to the assertions specified in the OpenGIS Simple Features Specification for SQL.

Method Detail

getDimension

public int getDimension()

Description copied from class: Geometry

Returns the dimension of this geometry. The dimension of a geometry is is the topological dimension of its embedding in the 2-D Euclidean plane. In the JTS spatial model, dimension values are in the set {0,1,2}.

Note that this is a different concept to the dimension of the vertex Coordinates. The geometry dimension can never be greater than the coordinate dimension. For example, a 0-dimensional geometry (e.g. a Point) may have a coordinate dimension of 3 (X,Y,Z).

Overrides:

getDimension in class GeometryCollection

Returns:

the topological dimension of this geometry.

getBoundaryDimension

public int getBoundaryDimension()

Description copied from class: Geometry

Returns the dimension of this Geometrys inherent boundary.

Overrides:

getBoundaryDimension in class GeometryCollection

Returns:

the dimension of the boundary of the class implementing this interface, whether or not this object is the empty geometry. Returns Dimension.FALSE if the boundary is the empty geometry.

getGeometryType

public java.lang.String getGeometryType()

Description copied from class: Geometry

Returns the name of this object's com.vivid.jts.geom interface.

Overrides:

getGeometryType in class GeometryCollection

Returns:

the name of this Geometrys most specific com.vividsolutions.jts.geom interface

isSimple

public boolean isSimple()

Description copied from class: Geometry

Tests whether this Geometry is simple. In general, the SFS specification of simplicity follows the rule:

• A Geometry is simple iff the only self-intersections are at boundary points.

Simplicity is defined for each Geometry subclass as follows:

• Valid polygonal geometries are simple by definition, so isSimple trivially returns true.
• Linear geometries are simple iff they do not self-intersect at points other than boundary points.
• Zero-dimensional geometries (points) are simple iff they have no repeated points.
• Empty Geometrys are always simple

  Overrides:

  isSimple in class Geometry

  Returns:

  true if this Geometry has any points of self-tangency, self-intersection or other anomalous points

  See Also:

  Geometry.isValid()

getBoundary

public Geometry getBoundary()

Computes the boundary of this geometry

Overrides:

getBoundary in class GeometryCollection

Returns:

a lineal geometry (which may be empty)

See Also:

Geometry.getBoundary()

equalsExact

public boolean equalsExact(Geometry other,
                           double tolerance)

Description copied from class: Geometry

Returns true if the two Geometrys are exactly equal, up to a specified distance tolerance. Two Geometries are exactly equal within a distance tolerance if and only if:

• they have the same structure
• they have the same values for their vertices, within the given tolerance distance, in exactly the same order.

This method does not test the values of the GeometryFactory, the SRID, or the userData fields.

To properly test equality between different geometries, it is usually necessary to Geometry.normalize() them first.

Overrides:

equalsExact in class GeometryCollection

Parameters:

other - the Geometry with which to compare this Geometry

tolerance - distance at or below which two Coordinates are considered equal

Returns:

true if this and the other Geometry have identical structure and point values, up to the distance tolerance.

See Also:

Geometry.equalsExact(Geometry), Geometry.normalize(), Geometry.norm()

reverse

public Geometry reverse()

Creates a MultiPolygon with every component reversed. The order of the components in the collection are not reversed.

Overrides:

reverse in class GeometryCollection

Returns:

a MultiPolygon in the reverse order