org.geotools.coverage.processing.operation
Class Resample

java.lang.Object
  org.geotools.coverage.processing.AbstractOperation
      org.geotools.coverage.processing.Operation2D
          org.geotools.coverage.processing.operation.Resample

All Implemented Interfaces:

org.opengis.coverage.processing.Operation, java.io.Serializable

Direct Known Subclasses:

Resampler2D.Operation

public class Resample

extends Operation2D

Resample a grid coverage using a different grid geometry. This operation provides the following functionality:

• Resampling
  The grid coverage can be resampled at a different cell resolution. Some implementations may be able to do resampling efficiently at any resolution. Also a non-rectilinear grid coverage can be accessed as rectilinear grid coverage with this operation.
• Reprojecting
  The new grid geometry can have a different coordinate reference system than the underlying grid geometry. For example, a grid coverage can be reprojected from a geodetic coordinate reference system to Universal Transverse Mercator CRS.
• Subsetting
  A subset of a grid can be viewed as a separate coverage by using this operation with a grid geometry which as the same geoferencing and a region. Grid range in the grid geometry defines the region to subset in the grid coverage.

Geotools extension:
The operation use the default CoordinateOperationFactory for creating a transformation from the source to the destination coordinate reference systems. If a custom factory is desired, it may be supplied as a rendering hint with the Hints.COORDINATE_OPERATION_FACTORY key. Rendering hints can be supplied to DefaultProcessor at construction time.

Name: "Resample"
JAI operator: "Affine" or "Warp"
Parameters:

Name	Class	Default value	Minimum value	Maximum value
	GridCoverage2D	N/A	N/A	N/A
	CharSequence	"NearestNieghbor"	N/A	N/A
	CoordinateReferenceSystem	Same as source grid coverage	N/A	N/A
	GridGeometry2D	(automatic)	N/A	N/A

Since:

2.2

Version:

$Id: Resample.java 17672 2006-01-19 00:25:55Z desruisseaux $

Author:

Martin Desruisseaux

See Also:

Operations.resample(org.opengis.coverage.Coverage, org.opengis.referencing.crs.CoordinateReferenceSystem), WarpDescriptor, Serialized Form

Field Summary

static org.opengis.parameter.ParameterDescriptor	COORDINATE_REFERENCE_SYSTEM The parameter descriptor for the coordinate reference system.
static org.opengis.parameter.ParameterDescriptor	GRID_GEOMETRY The parameter descriptor for the grid geometry.
static org.opengis.parameter.ParameterDescriptor	INTERPOLATION_TYPE The parameter descriptor for the interpolation type.

Fields inherited from class org.geotools.coverage.processing.Operation2D

SOURCE_0

Fields inherited from class org.geotools.coverage.processing.AbstractOperation

descriptor

Constructor Summary

Resample()
Constructs a operation.

Method Summary

protected org.opengis.coverage.Coverage

doOperation(org.opengis.parameter.ParameterValueGroup parameters, Hints hints) Resample a grid coverage.

Methods inherited from class org.geotools.coverage.processing.Operation2D

getFactory, getGridCoverageProcessor

Methods inherited from class org.geotools.coverage.processing.AbstractOperation

ensureNonNull, equals, getDescription, getDocURL, getName, getNumSources, getParameters, getProcessor, getVendor, getVersion, hashCode, toString

Methods inherited from class java.lang.Object

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

Field Detail

INTERPOLATION_TYPE

public static final org.opengis.parameter.ParameterDescriptor INTERPOLATION_TYPE

The parameter descriptor for the interpolation type.

COORDINATE_REFERENCE_SYSTEM

public static final org.opengis.parameter.ParameterDescriptor COORDINATE_REFERENCE_SYSTEM

The parameter descriptor for the coordinate reference system.

GRID_GEOMETRY

public static final org.opengis.parameter.ParameterDescriptor GRID_GEOMETRY

The parameter descriptor for the grid geometry.

Constructor Detail

Resample

public Resample()

Constructs a operation.

Method Detail

doOperation

protected org.opengis.coverage.Coverage doOperation(org.opengis.parameter.ParameterValueGroup parameters,
                                                    Hints hints)

Resample a grid coverage. This method is invoked by DefaultProcessor for the operation.

Specified by:

doOperation in class AbstractOperation

Parameters:

parameters - List of name value pairs for the parameters required for the operation.

hints - A set of rendering hints, or if none. The may provides hints for the following keys: Hints.COORDINATE_OPERATION_FACTORY and Hints.JAI_INSTANCE.

Returns:

The result as a coverage.