Package org.esa.snap.core.dataio.geocoding.util

Class RasterUtils

java.lang.Object

org.esa.snap.core.dataio.geocoding.util.RasterUtils

public class RasterUtils
extends Object

Constructor Summary

Constructors

Constructor	Description
RasterUtils()

Method Summary

Modifier and Type	Method	Description
static double	computeResolutionInKm(double[] lonData, double[] latData, int width, int height)
static boolean	containsAntiMeridian(double[] longitudes, int width)	Checks if the longitude data raster contains the anti-meridian.
static PixelPos[]	getPoleLocations(GeoRaster geoRaster)
static double[]	loadData(RasterDataNode dataNode)
static double[]	loadDataScaled(RasterDataNode dataNode)
static double[]	loadGeoData(RasterDataNode dataNode)	loads geo-location data as an array of doubles ready to use by ComponentGeoCoding.
static double[]	toDouble(float[] floats)
static float[]	toFloat(double[] doubles)

Methods inherited from class java.lang.Object

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

Constructor Detail

RasterUtils

public RasterUtils()

Method Detail

containsAntiMeridian

public static boolean containsAntiMeridian(double[] longitudes,
                                           int width)

Checks if the longitude data raster contains the anti-meridian. Runs along the raster borders and if a longitude-delta larger than 180 deg is detected, an anti-meridian crossing is contained in the data.

Parameters:

longitudes - the longitude raster

width - the data width in pixels

Returns:

whether the data contains the anti-meridian or not

getPoleLocations

public static PixelPos[] getPoleLocations(GeoRaster geoRaster)

toFloat

public static float[] toFloat(double[] doubles)

toDouble

public static double[] toDouble(float[] floats)

loadDataScaled

public static double[] loadDataScaled(RasterDataNode dataNode)
                               throws IOException

Throws:

IOException

loadData

public static double[] loadData(RasterDataNode dataNode)
                         throws IOException

Throws:

IOException

loadGeoData

public static double[] loadGeoData(RasterDataNode dataNode)
                            throws IOException

loads geo-location data as an array of doubles ready to use by ComponentGeoCoding. This method optimises the memory impact by disposing whatever is possible after the reading operation. Please do not use from a context where this is not desired.

Parameters:

dataNode - the raster data node providing the geolocation data

Returns:

the scaled array of geo-location values

Throws:

IOException - on disk-access errors

computeResolutionInKm

public static double computeResolutionInKm(double[] lonData,
                                           double[] latData,
                                           int width,
                                           int height)