org.geotoolkit.referencing.operation.transform
Class GridTransform2D

Object
  FormattableObject
      AbstractMathTransform
          GridTransform
              GridTransform2D

All Implemented Interfaces:

Serializable, Formattable, Parameterized, LenientComparable, MathTransform, MathTransform2D

Direct Known Subclasses:

NadconTransform, NTv2Transform

@Immutable
public class GridTransform2D
extends GridTransform
implements MathTransform2D

A specialization of GridTransform in the two-dimensional case. The default implementation is invertible for the OFFSET, NADCON and NTv2 grid types (assuming that the offsets are small), but not for the LOCALIZATION type. For an invertible localization grid, see the LocalizationGrid builder.

Since:

3.00

Version:

3.00

Author:

Rueben Schulz (UBC), Martin Desruisseaux (IRD, Geomatys)

See Also:

Serialized Form

Module:

referencing/geotk-referencing (download)

View source code for this class

Field Summary

Fields inherited from class GridTransform

grid, height, width

Fields inherited from class FormattableObject

EPSG, GEOTIFF, INTERNAL, OGC, SINGLE_LINE

Constructor Summary

protected

GridTransform2D(GridType type, DataBuffer grid, Dimension size, Rectangle2D area) Constructs a grid using the specified data.

Method Summary

Matrix	derivative(Point2D point) Gets an estimation of the derivative of this transform at a point.
MathTransform2D	inverse() Returns the inverse of this transform.

Methods inherited from class GridTransform

computeHashCode, create, create, create, derivative, equals, getSourceDimensions, getTargetDimensions, isIdentity, transform, transform, transform, transform, transform

Methods inherited from class AbstractMathTransform

createTransformedShape, ensureNonNull, equals, formatWKT, getName, getParameterDescriptors, getParameterValues, hashCode, rollLongitude, transform, transform

Methods inherited from class FormattableObject

getDefaultIndentation, print, setDefaultIndentation, toString, toWKT, toWKT, toWKT

Methods inherited from class Object

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

Methods inherited from interface MathTransform2D

createTransformedShape, transform

Methods inherited from interface MathTransform

derivative, getSourceDimensions, getTargetDimensions, isIdentity, toWKT, transform, transform, transform, transform, transform

Constructor Detail

GridTransform2D

protected GridTransform2D(GridType type,
                          DataBuffer grid,
                          Dimension size,
                          Rectangle2D area)

Constructs a grid using the specified data.

Parameters:

type - Whatever the grid values are directly the target coordinates or offsets to apply on source coordinates.

grid - The grid of values. It must complies with the conditions documented in the GridTransform.grid field.

size - Number of columns (width) and rows (height) in the grid.

area - Grid envelope in "real world" coordinates, or null if none. The minimal (x,y) coordinate will maps the (0,0) grid coordinate, and the maximal (x,y) coordinate will maps the (width, height) grid coordinate.

Method Detail

derivative

public Matrix derivative(Point2D point)

Gets an estimation of the derivative of this transform at a point.

Specified by:

derivative in interface MathTransform2D

Overrides:

derivative in class AbstractMathTransform

Parameters:

point - The coordinate point where to evaluate the derivative.

Returns:

The derivative at the specified point as a 2×2 matrix.

See Also:

MathTransform2D.derivative(Point2D)

inverse

public MathTransform2D inverse()
                        throws NoninvertibleTransformException

Returns the inverse of this transform.

Specified by:

inverse in interface MathTransform

Specified by:

inverse in interface MathTransform2D

Overrides:

inverse in class AbstractMathTransform

Throws:

NoninvertibleTransformException - If this transform is not invertible.