org.esa.snap.core.gpf.common.reproject

Class ReprojectionOp

java.lang.Object

org.esa.snap.core.gpf.Operator

org.esa.snap.core.gpf.common.reproject.ReprojectionOp

@OperatorMetadata(alias="Reproject",
                  category="Raster/Geometric",
                  version="1.0",
                  authors="Marco Z\u00fchlke, Marco Peters, Ralf Quast, Norman Fomferra",
                  copyright="(c) 2009 by Brockmann Consult",
                  description="Reprojection of a source product to a target Coordinate Reference System.",
                  internal=false)
public class ReprojectionOp
extends Operator

The reprojection operator is used to geo-reference data products. Beside plain reprojection it is able to use a Digital Elevation Model (DEM) to orthorectify a data product and to collocate one product with another.

The following XML sample shows how to integrate the Reproject operator in a processing graph (an Lambert_Azimuthal_Equal_Area projection using the WGS-84 datum):

    <node id="reprojectNode">
        <operator>Reproject</operator>
        <sources>
            <sourceProducts>readNode</sourceProducts>
        </sources>
        <parameters>
            <wktFile/>
            <crs>
              PROJCS["Lambert_Azimuthal_Equal_Area / World Geodetic System 1984",
                GEOGCS["World Geodetic System 1984",
                   DATUM["World Geodetic System 1984",
                      SPHEROID["WGS 84", 6378137.0, 298.257223563, AUTHORITY["EPSG","7030"]],
                   AUTHORITY["EPSG","6326"]],
                   PRIMEM["Greenwich", 0.0, AUTHORITY["EPSG","8901"]],
                   UNIT["degree", 0.017453292519943295],
                   AXIS["Geodetic longitude", EAST],
                   AXIS["Geodetic latitude", NORTH]],
                PROJECTION["Lambert_Azimuthal_Equal_Area"],
                PARAMETER["latitude_of_center", 0.0],
                PARAMETER["longitude_of_center", 0.0],
                PARAMETER["false_easting", 0.0],
                PARAMETER["false_northing", 0.0],
                UNIT["m", 1.0],
                AXIS["Easting", EAST],
                AXIS["Northing", NORTH]]
            </crs>
            <resampling>Nearest</resampling>
            <referencePixelX>0.5</referencePixelX>
            <referencePixelY>0.5</referencePixelY>
            <easting>9.5</easting>
            <northing>56.84</northing>
            <orientation>0.0</orientation>
            <pixelSizeX>0.012</pixelSizeX>
            <pixelSizeY>0.012</pixelSizeY>
            <width>135010246</width>
            <height>116629771</height>
            <orthorectify>false</orthorectify>
            <elevationModelName/>
            <noDataValue>NaN</noDataValue>
            <includeTiePointGrids>true</includeTiePointGrids>
            <addDeltaBands>false</addDeltaBands>
        </parameters>
    </node>
 

Since:

BEAM 4.7

Version:

$Revision$ $Date$

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ReprojectionOp.Spi

Constructor Summary

Constructors

Constructor and Description
ReprojectionOp()

Method Summary

Modifier and Type	Method and Description
void	dispose() Releases the resources the operator has acquired during its lifetime.
void	initialize() Initializes this operator and sets the one and only target product.
protected void	validateCrsParameters()

Methods inherited from class org.esa.snap.core.gpf.Operator

canComputeTile, canComputeTileStack, checkForCancellation, computeTile, computeTileStack, deactivateComputeTileMethod, doExecute, ensureSceneGeoCoding, ensureSingleRasterSize, ensureSingleRasterSize, execute, finalize, getId, getLogger, getParameter, getParameter, getProductManager, getSourceProduct, getSourceProduct, getSourceProductId, getSourceProducts, getSourceTile, getSourceTile, getSpi, getTargetProduct, getTargetProperty, setLogger, setParameter, setParameterDefaultValues, setRequiresAllBands, setSourceProduct, setSourceProduct, setSourceProducts, setSpi, setTargetProduct, stopTileComputationObservation, update

Methods inherited from class java.lang.Object

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

Constructor Detail

ReprojectionOp

public ReprojectionOp()

Method Detail

initialize

public void initialize()
                throws OperatorException

Description copied from class: Operator

Initializes this operator and sets the one and only target product.

The target product can be either defined by a field of type Product annotated with the TargetProduct annotation or by calling Operator.setTargetProduct(org.esa.snap.core.datamodel.Product) method.

This method shall never be called directly. The framework calls this method after it has created an instance of this Operator. This will occur only once durting the lifetime of an Operator instance. If not already done, calling the Operator.getTargetProduct() will always trigger a call to the initialize() method. Any client code that must be performed before computation of tile data should be placed here.

Specified by:

initialize in class Operator

Throws:

OperatorException - If an error occurs during operator initialisation.

See Also:

Operator.getTargetProduct()

dispose

public void dispose()

Description copied from class: Operator

Releases the resources the operator has acquired during its lifetime. The default implementation does nothing.

Overrides should make sure to call super.dispose() as well.

Overrides:

dispose in class Operator

validateCrsParameters

protected void validateCrsParameters()