org.cts.op.transformation

Class GeocentricTranslation

java.lang.Object

org.cts.IdentifiableComponent

org.cts.op.AbstractCoordinateOperation

org.cts.op.transformation.GeocentricTranslation

All Implemented Interfaces:

Identifiable, CoordinateOperation, GeocentricTransformation, GeoTransformation, ParamBasedTransformation

public class GeocentricTranslation
extends AbstractCoordinateOperation
implements GeoTransformation, ParamBasedTransformation

GeocentricTranslation is a coordinate operation used to transform geocentric coordinates with a 3D translation defined by three parameters representing translation values along x axis, y axis and z axis.

In this operation, one assume that the axis of the ellipsoids are parallel, that the prime meridian is Greenwich, and that there is no scale difference between the source and target CoordinateReferenceSystem.

Equations of this transformation are :

• X' = X + tx
• Y' = Y + ty
• Z' = Z + tz

Author:

Michaël Michaud, Erwan Bocher

Field Summary

Fields inherited from class org.cts.op.AbstractCoordinateOperation

precision

Fields inherited from interface org.cts.Identifiable

DEFAULT, LOCAL, UNKNOWN

Constructor Summary

Constructors

Constructor and Description
GeocentricTranslation(double tx, double ty, double tz) Geocentric translation.
GeocentricTranslation(double tx, double ty, double tz, double precision) Geocentric translation.

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object o) Returns true if o is equals to this.
int	hashCode() Returns the hash code for this GeocentricTranslation.
GeocentricTransformation	inverse() Creates the inverse CoordinateOperation.
boolean	isIdentity()
String	toString() Returns this Geocentric translation as a String.
String	toWKT() Returns this Geocentric translation as an OGC WKT String.
double[]	transform(double[] coord) Return a coordinates representing the same point as coord but in another CoordinateReferenceSystem.

Methods inherited from class org.cts.op.AbstractCoordinateOperation

getPrecision

Methods inherited from class org.cts.IdentifiableComponent

addAlias, addRemark, getAliases, getAuthorityKey, getAuthorityName, getCode, getComponent, getIdentifier, getName, getRemarks, getShortName, setIdentifier, setRemarks, setShortName

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.cts.op.CoordinateOperation

getPrecision

Methods inherited from interface org.cts.Identifiable

addAlias, addRemark, getAliases, getAuthorityKey, getAuthorityName, getCode, getName, getRemarks, getShortName, setRemarks, setShortName

Constructor Detail

GeocentricTranslation

public GeocentricTranslation(double tx,
                             double ty,
                             double tz,
                             double precision)

Geocentric translation.

Parameters:

tx - translation parameter along x axis (meters)

ty - translation parameter along y axis (meters)

tz - translation parameter along z axis (meters)

precision - mean precision of the geodetic transformation

GeocentricTranslation

public GeocentricTranslation(double tx,
                             double ty,
                             double tz)

Geocentric translation.

Parameters:

tx - translation parameter along x axis (meters)

ty - translation parameter along y axis (meters)

tz - translation parameter along z axis (meters)

Method Detail

transform

public double[] transform(double[] coord)
                   throws IllegalCoordinateException

Return a coordinates representing the same point as coord but in another CoordinateReferenceSystem.

Equations of this transformation are :

• X' = X + tx
• Y' = Y + ty
• Z' = Z + tz

Specified by:

transform in interface CoordinateOperation

Specified by:

transform in class AbstractCoordinateOperation

Parameters:

coord - coordinate to transform

Returns:

a double array containing the output coordinate

Throws:

IllegalCoordinateException - if coord is not compatible with this CoordinateOperation.

inverse

public GeocentricTransformation inverse()

Creates the inverse CoordinateOperation.

Specified by:

inverse in interface CoordinateOperation

Specified by:

inverse in interface GeocentricTransformation

Overrides:

inverse in class AbstractCoordinateOperation

toString

public String toString()

Returns this Geocentric translation as a String.

Overrides:

toString in class IdentifiableComponent

toWKT

public String toWKT()

Returns this Geocentric translation as an OGC WKT String.

Specified by:

toWKT in interface GeoTransformation

Returns:

equals

public boolean equals(Object o)

Returns true if o is equals to this. GeocentricTranslations are equals if they both are identity, or if all their parameters are equal.

Overrides:

equals in class IdentifiableComponent

Parameters:

o - The object to compare this ProjectedCRS against

hashCode

public int hashCode()

Returns the hash code for this GeocentricTranslation.

Overrides:

hashCode in class IdentifiableComponent

isIdentity

public boolean isIdentity()

Specified by:

isIdentity in interface CoordinateOperation

Overrides:

isIdentity in class AbstractCoordinateOperation

Returns:

true if this operation does not change coordinates.