org.esa.snap.core.datamodel

Class CrsGeoCoding

java.lang.Object

org.esa.snap.core.datamodel.AbstractGeoCoding

org.esa.snap.core.datamodel.CrsGeoCoding

All Implemented Interfaces:

GeoCoding

public class CrsGeoCoding
extends AbstractGeoCoding

A geo-coding that is based on a well-known coordinate reference system (CRS) and affine transformation used to locate a product's scene image within the CRS.

Since:

BEAM 4.7

Constructor Summary

Constructors

Constructor and Description
CrsGeoCoding(org.opengis.referencing.crs.CoordinateReferenceSystem mapCRS, int imageWidth, int imageHeight, double easting, double northing, double pixelSizeX, double pixelSizeY) Constructs a new instance of this class from a map CRS, image dimension, and image-to-map transformation parameters.
CrsGeoCoding(org.opengis.referencing.crs.CoordinateReferenceSystem mapCRS, int imageWidth, int imageHeight, double easting, double northing, double pixelSizeX, double pixelSizeY, double referencePixelX, double referencePixelY) Constructs a new instance of this class from a map CRS, image dimension, and image-to-map transformation parameters.
CrsGeoCoding(org.opengis.referencing.crs.CoordinateReferenceSystem mapCRS, Rectangle imageBounds, AffineTransform imageToMap)

Method Summary

Modifier and Type	Method and Description
boolean	canGetGeoPos() Checks whether or not this geo-coding can determine the geodetic position from a pixel position.
boolean	canGetPixelPos() Checks whether or not this geo-coding can determine the pixel position from a geodetic position.
void	dispose() Releases all of the resources used by this object instance and all of its owned children.
org.esa.snap.core.dataop.maptransf.Datum	getDatum() Gets the datum, the reference point or surface against which GeoPos measurements are made.
GeoPos	getGeoPos(PixelPos pixelPos, GeoPos geoPos) Returns the latitude and longitude value for a given pixel co-ordinate.
org.opengis.referencing.operation.MathTransform	getImageToMapTransform()
PixelPos	getPixelPos(GeoPos geoPos, PixelPos pixelPos) Returns the pixel co-ordinates as x/y for a given geographical position given as lat/lon.
void	getPixels(int x1, int y1, int w, int h, double[] latPixels, double[] lonPixels)
boolean	isCrossingMeridianAt180() Checks whether or not the longitudes of this geo-coding cross the +/- 180 degree meridian.
String	toString()
boolean	transferGeoCoding(Scene srcScene, Scene destScene, ProductSubsetDef subsetDef) Transfers the geo-coding of the srcScene to the destScene with respect to the given subsetDef.

Methods inherited from class org.esa.snap.core.datamodel.AbstractGeoCoding

createImageCRS, getGeoCRS, getImageCRS, getMapCRS, setGeoCRS, setImageCRS, setMapCRS

Methods inherited from class java.lang.Object

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

Constructor Detail

CrsGeoCoding

public CrsGeoCoding(org.opengis.referencing.crs.CoordinateReferenceSystem mapCRS,
                    int imageWidth,
                    int imageHeight,
                    double easting,
                    double northing,
                    double pixelSizeX,
                    double pixelSizeY)
             throws org.opengis.referencing.FactoryException,
                    org.opengis.referencing.operation.TransformException

Constructs a new instance of this class from a map CRS, image dimension, and image-to-map transformation parameters. The reference pixel is set to the BEAM default value, namely the center of the upper left image pixel (i.e. referencePixelX = referencePixelY = 0.5).

Parameters:

mapCRS - the map CRS.

imageWidth - the width of the image.

imageHeight - the height of the image.

easting - the easting of the reference pixel position.

northing - the northing of the reference pixel position.

pixelSizeX - the size of a pixel along the x-axis in map units.

pixelSizeY - the size of a pixel along the y-axis in map units (negative, if positive image Y-axis points up).

Throws:

org.opengis.referencing.FactoryException - when an error occurred.

org.opengis.referencing.operation.TransformException - when an error occurred.

CrsGeoCoding

public CrsGeoCoding(org.opengis.referencing.crs.CoordinateReferenceSystem mapCRS,
                    int imageWidth,
                    int imageHeight,
                    double easting,
                    double northing,
                    double pixelSizeX,
                    double pixelSizeY,
                    double referencePixelX,
                    double referencePixelY)
             throws org.opengis.referencing.FactoryException,
                    org.opengis.referencing.operation.TransformException

Constructs a new instance of this class from a map CRS, image dimension, and image-to-map transformation parameters.

Parameters:

mapCRS - the map CRS.

imageWidth - the width of the image.

imageHeight - the height of the image.

easting - the easting of the reference pixel position.

northing - the northing of the reference pixel position.

pixelSizeX - the size of a pixel along the x-axis in map units.

pixelSizeY - the size of a pixel along the y-axis in map units (negative, if positive image Y-axis points up).

referencePixelX - the x-position of the reference pixel.

referencePixelY - the y-position of the reference pixel.

Throws:

org.opengis.referencing.FactoryException - when an error occurred.

org.opengis.referencing.operation.TransformException - when an error occurred.

CrsGeoCoding

public CrsGeoCoding(org.opengis.referencing.crs.CoordinateReferenceSystem mapCRS,
                    Rectangle imageBounds,
                    AffineTransform imageToMap)
             throws org.opengis.referencing.FactoryException,
                    org.opengis.referencing.operation.TransformException

Throws:

org.opengis.referencing.FactoryException

org.opengis.referencing.operation.TransformException

Method Detail

getImageToMapTransform

public org.opengis.referencing.operation.MathTransform getImageToMapTransform()

Specified by:

getImageToMapTransform in interface GeoCoding

Overrides:

getImageToMapTransform in class AbstractGeoCoding

Returns:

The math transformation used to convert image coordinates to map coordinates.

transferGeoCoding

public boolean transferGeoCoding(Scene srcScene,
                                 Scene destScene,
                                 ProductSubsetDef subsetDef)

Description copied from class: AbstractGeoCoding

Transfers the geo-coding of the srcScene to the destScene with respect to the given subsetDef.

Specified by:

transferGeoCoding in class AbstractGeoCoding

Parameters:

srcScene - the source scene

destScene - the destination scene

subsetDef - the definition of the subset, may be null

Returns:

true, if the geo-coding could be transferred.

canGetGeoPos

public boolean canGetGeoPos()

Description copied from interface: GeoCoding

Checks whether or not this geo-coding can determine the geodetic position from a pixel position.

Returns:

true, if so

canGetPixelPos

public boolean canGetPixelPos()

Description copied from interface: GeoCoding

Checks whether or not this geo-coding can determine the pixel position from a geodetic position.

Returns:

true, if so

dispose

public void dispose()

Description copied from interface: GeoCoding

Releases all of the resources used by this object instance and all of its owned children. Its primary use is to allow the garbage collector to perform a vanilla job.

This method should be called only if it is for sure that this object instance will never be used again. The results of referencing an instance of this class after a call to dispose() are undefined.

getDatum

public org.esa.snap.core.dataop.maptransf.Datum getDatum()

Description copied from interface: GeoCoding

Gets the datum, the reference point or surface against which GeoPos measurements are made.

Returns:

the datum

getGeoPos

public GeoPos getGeoPos(PixelPos pixelPos,
                        GeoPos geoPos)

Description copied from interface: GeoCoding

Returns the latitude and longitude value for a given pixel co-ordinate.

Parameters:

pixelPos - the pixel's co-ordinates given as x,y

geoPos - an instance of GeoPos to be used as return value. If this parameter is null, the method creates a new instance which it then returns.

Returns:

the geographical position as lat/lon in the coordinate system determined by GeoCoding.getGeoCRS()

getPixelPos

public PixelPos getPixelPos(GeoPos geoPos,
                            PixelPos pixelPos)

Description copied from interface: GeoCoding

Returns the pixel co-ordinates as x/y for a given geographical position given as lat/lon.

Parameters:

geoPos - the geographical position as lat/lon in the coordinate system determined by GeoCoding.getGeoCRS()

pixelPos - an instance of Point to be used as return value. If this parameter is null, the method creates a new instance which it then returns.

Returns:

the pixel co-ordinates as x/y

getPixels

public final void getPixels(int x1,
                            int y1,
                            int w,
                            int h,
                            double[] latPixels,
                            double[] lonPixels)

isCrossingMeridianAt180

public boolean isCrossingMeridianAt180()

Description copied from interface: GeoCoding

Checks whether or not the longitudes of this geo-coding cross the +/- 180 degree meridian.

Returns:

true, if so

toString

public String toString()

Overrides:

toString in class Object