org.opengis.spatialschema.geometry.primitive

Interface Point

All Superinterfaces:

Geometry, Position, Primitive, TransfiniteSet

@UML(identifier="GM_Point",
     specification=ISO_19107)
public interface Point
extends Primitive, Position

Basic data type for a geometric object consisting of one and only one point. In most cases, the state of a Point is fully determined by its position attribute. The only exception to this is if the Point has been subclassed to provide additional non-geometric information such as symbology.

Since:

GeoAPI 1.0

See Also:

PrimitiveFactory.createPoint(double[])

Method Summary

Modifier and Type	Method and Description
Bearing	getBearing(Position toPoint) Returns the bearing, as a unit vector, of the tangent (at this Point) to the curve between this Point and a passed position.
DirectPosition	getPosition() Returns the direct position of this point.
void	setPosition(DirectPosition position) Sets the direct position of this point.

Methods inherited from interface org.opengis.spatialschema.geometry.primitive.Primitive

getComplexes, getContainedPrimitives, getContainingPrimitives, getProxy

Methods inherited from interface org.opengis.spatialschema.geometry.Geometry

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

Methods inherited from interface org.opengis.spatialschema.geometry.TransfiniteSet

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

Method Detail

getPosition

@UML(identifier="position",
     obligation=MANDATORY,
     specification=ISO_19107)
DirectPosition getPosition()

Returns the direct position of this point. Point is the only subclass of primitive that cannot use positions to represent its defining geometry. A position is either a direct position or a reference to a Point (from which a direct position may be obtained). By not allowing Point to use this technique, infinitely recursive references are prevented.

Specified by:

getPosition in interface Position

Returns:

The direct position.

setPosition

@UML(identifier="position",
     obligation=MANDATORY,
     specification=ISO_19107)
void setPosition(DirectPosition position)
                                                                                               throws UnmodifiableGeometryException

Sets the direct position of this point. Point is the only subclass of primitive that cannot use positions to represent its defining geometry. A position is either a direct position or a reference to a Point (from which a direct position may be obtained). By not allowing Point to use this technique, infinitely recursive references are prevented.

Parameters:

position - The direct position.

Throws:

UnmodifiableGeometryException - if this geometry is not modifiable.

getBearing

@UML(identifier="bearing",
     obligation=MANDATORY,
     specification=ISO_19107)
Bearing getBearing(Position toPoint)

Returns the bearing, as a unit vector, of the tangent (at this Point) to the curve between this Point and a passed position. The choice of the curve type for defining the bearing is dependent on the coordinate reference system in which this Point is defined. For example, in the Mercator projection, the curve is the rhumb line. In 3D, geocentric coordinate system, the curve may be the geodesic joining the two points along the surface of the geoid or ellipsoid in use. Implementations that support this function shall specify the nature of the curve to be used.

Parameters:

toPoint - the destination point.

Returns:

The tangent to the curve between this point and the passed position.