Re: [Geotools-gt2-users] Help creating an image + world file from an ArcGrid file

[gaby <g....@ni...>]

OK the problem is the number of color bands. If I do this:

CoordinateReferenceSystem crs = CRS.decode("EPSG:27200");
reader = new ArcGridReader(new File("TestData/test.asc"), new 
               Hints(Hints.DEFAULT_COORDINATE_REFERENCE_SYSTEM, crs));
GridCoverage2D coverage = reader.read(null);
RenderedImage img = coverage.getRenderedImage();
RenderedOp ro = grayscaleToRGB(img);
BufferedImage bi = ro.getAsBufferedImage();
GridCoverage2D newcov = (new GridCoverageFactory()).create("new", bi,
coverage.getEnvelope());
WorldImageWriter wiw = new WorldImageWriter(new
File("TestData/togrid.png"));
wiw.write(newcov, null);
wiw.dispose();

where:

public RenderedOp grayscaleToRGB(RenderedImage src){
    double[][] matrix = {
              { 1.0D, 0.0D },
              { 1.0D, 0.0D },
             { 1.0D, 0.0D }
         };
            
         ParameterBlock pb = new ParameterBlock();
         pb.addSource(src);
         pb.add(matrix);
          
//          Perform the band combine operation.
         
         return (RenderedOp) RenderedOp.wrapRenderedImage((RenderedImage)
JAI.create("bandcombine", pb, null));
   }

It works fine





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