I am reading a PNG image with world file in NZMG (EPSG:27200), reprojecting
to NZTM (EPSG:2193) and saving the resulting reprojection to file using
WorldImageWriter.
When I view the images in Udig, the reprojected image is rotated 90
counterclockwise from the original image.
I can see there is a problem from the .pnw file
1.9992326319956684
0.0
0.0
-1.9993387541250558
5178586.918711518
1570650.3363139206
The x and y coordinates of the corner are switched.
What I am i doing wrong in reprojecting this data?
The code doing the reprojection is:
try
{
File rasterFile = new File("TestData/heathcote_max_vel.png");
WorldImageFormat format = (WorldImageFormat)
GridFormatFinder.findFormat( rasterFile );
AbstractGridCoverage2DReader reader =
format.getReader(rasterFile);
//WorldImageReader reader = new
WorldImageReader(rasterFile, null);
GridCoverage2D myGridCov = reader.read(null);
GridCoverage2D reprojected = (GridCoverage2D)
Operations.DEFAULT.resample(myGridCov, CRS.decode("EPSG:2193"));
WorldImageWriter wiw = new WorldImageWriter(new
File("TestData/heathcoteTONZMG.png"));
ParameterValueGroup params =
reader.getFormat().getWriteParameters();
params.parameter(WorldImageFormat.FORMAT.getName().toString()).setValue("png");
GeneralParameterValue[] gpv = {
params.parameter(WorldImageFormat.FORMAT.getName().toString()) };
wiw.write(reprojected, gpv);
wiw.dispose();
} catch (Exception e) {
}
Gaby
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