org.osgeo.proj4j

Class CoordinateReferenceSystem

java.lang.Object

org.osgeo.proj4j.CoordinateReferenceSystem

public class CoordinateReferenceSystem
extends Object

Represents a projected or geodetic geospatial coordinate system, to which coordinates may be referenced. A coordinate system is defined by the following things:

• an Ellipsoid specifies how the shape of the Earth is approximated
• a Datum provides the mapping from the ellipsoid to actual locations on the earth
• a Projection method maps the ellpsoidal surface to a planar space. (The projection method may be null in the case of geodetic coordinate systems).
• a Unit indicates how the ordinate values of coordinates are interpreted

Author:

Martin Davis

See Also:

CRSFactory

Field Summary

Fields

Modifier and Type	Field and Description
static CoordinateReferenceSystem	CS_GEO

Constructor Summary

Constructors

Constructor and Description
CoordinateReferenceSystem(String name, String[] params, Datum datum, Projection proj)

Method Summary

Methods

Modifier and Type	Method and Description
CoordinateReferenceSystem	createGeographic() Creates a geographic (unprojected) CoordinateReferenceSystem based on the Datum of this CRS.
Datum	getDatum()
String	getName()
String[]	getParameters()
String	getParameterString()
Projection	getProjection()
String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

CS_GEO

public static final CoordinateReferenceSystem CS_GEO

Constructor Detail

CoordinateReferenceSystem

public CoordinateReferenceSystem(String name,
                         String[] params,
                         Datum datum,
                         Projection proj)

Method Detail

getName

public String getName()

getParameters

public String[] getParameters()

getDatum

public Datum getDatum()

getProjection

public Projection getProjection()

getParameterString

public String getParameterString()

createGeographic

public CoordinateReferenceSystem createGeographic()

Creates a geographic (unprojected) CoordinateReferenceSystem based on the Datum of this CRS. This is useful for defining CoordinateTransforms to and from geographic coordinate systems, where no datum transformation is required. The Units of the geographic CRS are set to Units.DEGREES.

Returns:

a geographic CoordinateReferenceSystem based on the datum of this CRS

toString

public String toString()

Overrides:

toString in class Object