@Test
public void testGrid2Grid() throws Exception {
GeoRaster gr = GeoRasterFactory.createGeoRaster(otherData + "sample.asc");
gr.open();
final RasterMetadata originalMetadata = gr.getMetadata();
final float[] pixels = gr.getFloatPixels();
final File file2 = new File(tmpData + "1.asc");
gr.save(file2.getAbsolutePath());
gr = GeoRasterFactory.createGeoRaster(file2.getAbsolutePath());
gr.open();
final float[] gridPixels = gr.getFloatPixels();
assertTrue(gridPixels.length == pixels.length);
equals(pixels, gridPixels);
final RasterMetadata newM = gr.getMetadata();
assertTrue(newM.getEnvelope().equals(originalMetadata.getEnvelope()));
assertTrue(newM.getNCols() == originalMetadata.getNCols());
assertTrue(newM.getNRows() == originalMetadata.getNRows());
assertTrue(newM.getPixelSize_X() == originalMetadata.getPixelSize_X());
assertTrue(newM.getPixelSize_Y() == originalMetadata.getPixelSize_Y());
assertTrue(newM.getRotation_X() == originalMetadata.getRotation_X());
assertTrue(newM.getRotation_Y() == originalMetadata.getRotation_Y());
assertTrue(newM.getXulcorner() == originalMetadata.getXulcorner());
assertTrue(newM.getYulcorner() == originalMetadata.getYulcorner());
}
private void checkCrop(
final Envelope envelope, final ImagePlus srcPixelProvider, final ImagePlus dstPixelProvider)
throws IOException {
// check metadata
final RasterMetadata dstMetadata = geoRasterDst.getMetadata();
final float pixelSize_X = dstMetadata.getPixelSize_X();
final float pixelSize_Y = dstMetadata.getPixelSize_Y();
final float halfPixelSize_X = dstMetadata.getPixelSize_X() / 2;
final float halfPixelSize_Y = Math.abs(dstMetadata.getPixelSize_Y()) / 2;
final int ncols = dstMetadata.getNCols();
final int nrows = dstMetadata.getNRows();
final double xulcorner = dstMetadata.getXulcorner();
final double yulcorner = dstMetadata.getYulcorner();
assertTrue(pixelSize_X == geoRasterDst.getMetadata().getPixelSize_X());
assertTrue(ncols * pixelSize_X == dstMetadata.getEnvelope().getWidth());
assertTrue(
xulcorner - (pixelSize_X / 2) + ncols * pixelSize_X == dstMetadata.getEnvelope().getMaxX());
assertTrue(pixelSize_Y == geoRasterDst.getMetadata().getPixelSize_Y());
assertTrue(nrows * Math.abs(pixelSize_Y) == dstMetadata.getEnvelope().getHeight());
assertTrue(
yulcorner - (pixelSize_Y / 2) - nrows * Math.abs(pixelSize_Y)
== dstMetadata.getEnvelope().getMinY());
// check raster values
for (double y = envelope.getMinY() + halfPixelSize_Y; y < envelope.getMaxY(); y = y + 1) {
for (double x = envelope.getMinX() + halfPixelSize_X; x < envelope.getMaxX(); x = x + 1) {
final Point2D srcPixel = geoRasterSrc.fromRealWorldToPixel(x, y);
final Point2D dstPixel = geoRasterDst.fromRealWorldToPixel(x, y);
final float srcPixelValue =
srcPixelProvider
.getProcessor()
.getPixelValue((int) srcPixel.getX(), (int) srcPixel.getY());
final float dstPixelValue =
dstPixelProvider
.getProcessor()
.getPixelValue((int) dstPixel.getX(), (int) dstPixel.getY());
if (Float.isNaN(srcPixelValue)) {
assertTrue(Float.isNaN(dstPixelValue));
} else {
assertTrue("pixel[" + x + ", " + y + "]", srcPixelValue == dstPixelValue);
}
}
}
}