@Test
public void testDomainSubsetRxRy() throws Exception {
// get base coverage
final GridCoverage baseCoverage =
catalog.getCoverageByName(TASMANIA_BM.getLocalPart()).getGridCoverage(null, null);
final AffineTransform2D expectedTx =
(AffineTransform2D) baseCoverage.getGridGeometry().getGridToCRS();
final GeneralEnvelope originalEnvelope = (GeneralEnvelope) baseCoverage.getEnvelope();
final GeneralEnvelope newEnvelope = new GeneralEnvelope(originalEnvelope);
newEnvelope.setEnvelope(
originalEnvelope.getMinimum(0),
originalEnvelope.getMaximum(1) - originalEnvelope.getSpan(1) / 2,
originalEnvelope.getMinimum(0) + originalEnvelope.getSpan(0) / 2,
originalEnvelope.getMaximum(1));
final MathTransform cornerWorldToGrid =
PixelTranslation.translate(expectedTx, PixelInCell.CELL_CENTER, PixelInCell.CELL_CORNER);
final GeneralGridEnvelope expectedGridEnvelope =
new GeneralGridEnvelope(
CRS.transform(cornerWorldToGrid.inverse(), newEnvelope),
PixelInCell.CELL_CORNER,
false);
final StringBuilder envelopeBuilder = new StringBuilder();
envelopeBuilder.append(newEnvelope.getMinimum(0)).append(",");
envelopeBuilder.append(newEnvelope.getMinimum(1)).append(",");
envelopeBuilder.append(newEnvelope.getMaximum(0)).append(",");
envelopeBuilder.append(newEnvelope.getMaximum(1));
Map<String, Object> raw = baseMap();
final String layerID = getLayerId(TASMANIA_BM);
raw.put("sourcecoverage", layerID);
raw.put("version", "1.0.0");
raw.put("format", "image/geotiff");
raw.put("BBox", envelopeBuilder.toString());
raw.put("crs", "EPSG:4326");
raw.put("resx", Double.toString(expectedTx.getScaleX()));
raw.put("resy", Double.toString(Math.abs(expectedTx.getScaleY())));
final GridCoverage[] coverages = executeGetCoverageKvp(raw);
final GridCoverage2D result = (GridCoverage2D) coverages[0];
assertTrue(coverages.length == 1);
final AffineTransform2D tx = (AffineTransform2D) result.getGridGeometry().getGridToCRS();
assertEquals("resx", expectedTx.getScaleX(), tx.getScaleX(), 1E-6);
assertEquals("resx", Math.abs(expectedTx.getScaleY()), Math.abs(tx.getScaleY()), 1E-6);
final GridEnvelope gridEnvelope = result.getGridGeometry().getGridRange();
assertEquals("w", 180, gridEnvelope.getSpan(0));
assertEquals("h", 180, gridEnvelope.getSpan(1));
assertEquals("grid envelope", expectedGridEnvelope, gridEnvelope);
// dispose
CoverageCleanerCallback.disposeCoverage(baseCoverage);
CoverageCleanerCallback.disposeCoverage(coverages[0]);
}
/**
* <strong>Scaling</strong><br>
* Let user to scale down to the EXACT needed resolution. This step does not prevent from having
* loaded an overview of the original image based on the requested scale.
*
* @param coverage GridCoverage2D
* @param newGridRange GridRange
* @param sourceCoverage GridCoverage
* @param sourceCRS CoordinateReferenceSystem
* @param destinationEnvelopeInSourceCRS
* @return GridCoverage2D
*/
public static GridCoverage2D scale(
final GridCoverage2D coverage,
final GridEnvelope newGridRange,
final GridCoverage sourceCoverage,
final CoordinateReferenceSystem sourceCRS,
final GeneralEnvelope destinationEnvelopeInSourceCRS) {
// ///////////////////////////////////////////////////////////////////
//
// SCALE to the needed resolution
// Let me now scale down to the EXACT needed resolution. This step does
// not prevent from having loaded an overview of the original image
// based on the requested scale.
//
// ///////////////////////////////////////////////////////////////////
GridGeometry2D scaledGridGeometry =
new GridGeometry2D(
newGridRange,
(destinationEnvelopeInSourceCRS != null)
? destinationEnvelopeInSourceCRS
: sourceCoverage.getEnvelope());
/*
* Operations.DEFAULT.resample( coverage, sourceCRS, scaledGridGeometry,
* Interpolation.getInstance(Interpolation.INTERP_NEAREST));
*/
final ParameterValueGroup param = (ParameterValueGroup) resampleParams.clone();
param.parameter("Source").setValue(coverage);
param.parameter("CoordinateReferenceSystem").setValue(sourceCRS);
param.parameter("GridGeometry").setValue(scaledGridGeometry);
param
.parameter("InterpolationType")
.setValue(Interpolation.getInstance(Interpolation.INTERP_NEAREST));
final GridCoverage2D scaledGridCoverage =
(GridCoverage2D) resampleFactory.doOperation(param, hints);
return scaledGridCoverage;
}