/**
* Reads a {@link GridCoverage2D} from the grass raster.
*
* @param jGrassMapEnvironment the {@link JGrassMapEnvironment}.
* @param readRegion the region to read, or <code>null</code>.
* @return the read coverage.
* @throws Exception
*/
public static GridCoverage2D getGridcoverageFromGrassraster(
JGrassMapEnvironment jGrassMapEnvironment, JGrassRegion readRegion) throws Exception {
CoordinateReferenceSystem crs = jGrassMapEnvironment.getCoordinateReferenceSystem();
JGrassRegion jGrassRegion = readRegion;
if (jGrassRegion == null) jGrassRegion = jGrassMapEnvironment.getActiveRegion();
GeneralParameterValue[] readParams =
JGrassCatalogUtilities.createGridGeometryGeneralParameter(
jGrassRegion.getCols(),
jGrassRegion.getRows(),
jGrassRegion.getNorth(),
jGrassRegion.getSouth(),
jGrassRegion.getWest(),
jGrassRegion.getEast(),
crs);
AbstractGridFormat format =
(AbstractGridFormat) new GrassCoverageFormatFactory().createFormat();
GridCoverageReader reader = format.getReader(jGrassMapEnvironment.getCELL());
GridCoverage2D mapCoverage = ((GridCoverage2D) reader.read(readParams));
return mapCoverage;
}
public static void writeGridCoverageFromGrassraster(
File mapFile, JGrassRegion writeRegion, GridCoverage2D grassCoverage) throws Exception {
JGrassMapEnvironment mapEnvironment = new JGrassMapEnvironment(mapFile);
GrassCoverageFormat format = new GrassCoverageFormatFactory().createFormat();
GridCoverageWriter writer = format.getWriter(mapEnvironment.getCELL(), null);
GeneralParameterValue[] readParams = null;
if (writeRegion == null) {
writeRegion = mapEnvironment.getActiveRegion();
}
readParams =
JGrassCatalogUtilities.createGridGeometryGeneralParameter(
writeRegion.getCols(),
writeRegion.getRows(),
writeRegion.getNorth(),
writeRegion.getSouth(),
writeRegion.getEast(),
writeRegion.getWest(),
mapEnvironment.getCoordinateReferenceSystem());
writer.write(grassCoverage, readParams);
}
