Package org.geotools.referencing.operation.transform

Class EarthGravitationalModel

Object

Formattable

AbstractMathTransform

VerticalTransform

EarthGravitationalModel

All Implemented Interfaces:

MathTransform

public final class EarthGravitationalModel
extends VerticalTransform

Transforms vertical coordinates using coefficients from the Earth Gravitational Model.

Aknowledgement
This class is an adaption of Fortran code clenqt.for from the National Geospatial-Intelligence Agency and available in public domain. The normalized geopotential coefficients file bundled in this module is an adaptation of egm180.nor file, with some spaces trimmed.

Since:

2.3

Author:

Pierre Cardinal, Martin Desruisseaux

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	EarthGravitationalModel.Provider	The provider for EarthGravitationalModel.

Nested classes/interfaces inherited from class AbstractMathTransform

AbstractMathTransform.Inverse

Field Summary

Fields inherited from class Formattable

SINGLE_LINE

Method Summary

Modifier and Type	Method	Description
ParameterDescriptorGroup	getParameterDescriptors()	Returns the parameter descriptors for this math transform.
ParameterValueGroup	getParameterValues()	Returns the parameters for this math transform.
double	heightOffset(double longitude, double latitude, double height)	Returns the value to add to a height above the ellipsoid in order to get a height above the geoid for the specified geographic coordinate.

Methods inherited from class VerticalTransform

getSourceDimensions, getTargetDimensions, transform, transform

Methods inherited from class AbstractMathTransform

createTransformedShape, derivative, derivative, ensureNonNull, equals, formatWKT, getName, hashCode, inverse, isIdentity, needCopy, normalizeAngle, rollLongitude, transform, transform, transform, transform

Methods inherited from class Formattable

cleanupThreadLocals, toString, toWKT, toWKT, toWKT, toWKT

Methods inherited from class Object

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

Methods inherited from interface MathTransform

toWKT

Method Details

heightOffset

public double heightOffset(double longitude,
 double latitude,
 double height)
                    throws TransformException

Returns the value to add to a height above the ellipsoid in order to get a height above the geoid for the specified geographic coordinate.

Specified by:

heightOffset in class VerticalTransform

Parameters:

longitude - The geodetic longitude, in decimal degrees.

latitude - The geodetic latitude, in decimal degrees.

height - The height above the ellipsoid in metres.

Returns:

The value to add in order to get the height above the geoid (in metres).

Throws:

TransformException - if the offset can't be computed for the specified coordinates.

getParameterDescriptors

public ParameterDescriptorGroup getParameterDescriptors()

Returns the parameter descriptors for this math transform.

Overrides:

getParameterDescriptors in class AbstractMathTransform

Returns:

The parameter descriptors for this math transform, or null.

See Also:

• OperationMethod.getParameters()

getParameterValues

public ParameterValueGroup getParameterValues()

Returns the parameters for this math transform.

Overrides:

getParameterValues in class AbstractMathTransform

Returns:

A copy of the parameter values for this math transform, or null.

See Also:

• Operation.getParameterValues()