[Geotools-gt2-users] Geotools + Apache Solr

[Joseph O. <jo...@lo...>]

Hi - I'm very interested in using GeoTools HeatmapProcess to handle 
raster data from Apache Solr Cloud.  So far I've been able to generate 
views from the raster data using a GridCoverage2D, but when I try to 
apply the heat map process, I get an empty frame.  Any tips?

Thank you!

-Joe
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/**
      * Create a new coverage from the given data array. All non-zero array
      * values are written to the coverage as 1; zero values as 0.
      */
     public GridCoverage2D makeBinaryCoverage(int[][] data) {
         GridCoverageFactory gcf
                 = CoverageFactoryFinder.getGridCoverageFactory(null);

         // Assume data array is in row-major order
         final int dataW = data[0].length;
         final int dataH = data.length;
         final int imgTileW = 128;

         // image tile sample model
         SampleModel sm = new ComponentSampleModel(DataBuffer.TYPE_BYTE,
                 imgTileW, imgTileW, 1, imgTileW, new int[]{0});

         ColorModel cm = TiledImage.createColorModel(sm);

         TiledImage img = new TiledImage(0, 0, dataW, dataH, 0, 0, sm, cm);
         System.out.println("DataH: "+dataH+" dataW: "+dataW);

         for (int y = 0; y < dataH; y++) {
             for (int x = 0; x < dataW; x++) {
                 if (data[y][x] != 0) {
                     img.setSample(x, y, 0, data[y][x]);
                 }
             }
         }

         // Set world coords as 1:1 with image coords for this example
         ReferencedEnvelope env = new ReferencedEnvelope(
                 new Rectangle2D.Double(0, 0, dataW, dataH), 
DefaultEngineeringCRS.CARTESIAN_2D);
         return gcf.create("HeatMap", img, env);
     }
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