Hi Ian,
I do this...
public GridCoverage2D createCoverage(double[][] data, String name,
Envelope env) {
int width = data[0].length;
int height = data.length;
WritableRaster raster =
RasterFactory.createBandedRaster(DataBuffer.TYPE_DOUBLE, width,
height, 1, null);
for (int y = 0; y < height; y++) {
for (int x = 0; x < width; x++) {
raster.setSample(x, y, 0, data[y][x]);
}
}
GridCoverageFactory gcf =
CoverageFactoryFinder.getGridCoverageFactory(null);
return gcf.create(name, raster, env);
}
It is just a simplified version of the GridCoverageFactory.create
method that takes float arrays.
The imports are...
import java.awt.image.DataBuffer;
import java.awt.image.WritableRaster;
import javax.media.jai.RasterFactory;
import org.geotools.coverage.CoverageFactoryFinder;
import org.geotools.coverage.grid.GridCoverage2D;
import org.geotools.coverage.grid.GridCoverageFactory;
import org.opengis.geometry.Envelope;
Michael
On 21 December 2010 15:07, Ian Turton <[email protected]> wrote:
> Does any one have example code of how I could go about building a
> GridCoverage2D from an array of doubles?
> Currently I have:
>
> private GridCoverage2D convert(ArrayList<Circle> results) {
> ReferencedEnvelope resBounds = new
> ReferencedEnvelope(bounds.getCoordinateReferenceSystem());
> for(Circle c:results) {
> resBounds.expandToInclude(c.getBounds());
> }
> System.out.println(resBounds);
> GridCoverageBuilder builder = new GridCoverageBuilder();
> builder.setEnvelope(bounds);
>
> builder.setCoordinateReferenceSystem(bounds.getCoordinateReferenceSystem());
> final double scale = 1000.0;
> final int width = (int)(resBounds.getWidth()/scale);
> final int height = (int)(resBounds.getHeight()/scale);
> builder.setImageSize(width, height);
> BufferedImage img = builder.getBufferedImage();
> QuantizeCircle qc = new QuantizeCircle(img);
> qc.setCellsize(scale);
> for(Circle c:results) {
> qc.quantize(c);
> }
> return builder.getGridCoverage2D();
> }
>
> But I'm struggling with the quantize function as the image doesn't
> seem to be the size I was expecting, so I thought I'd ask here to see
> if there is an easier way to do this?
>
> Thanks
>
> Ian
>
> PS If you want to see all the code look at
> http://code.google.com/p/spatial-cluster-detection/source/browse/trunk/cluster/?r=10
> --
> Ian Turton
>
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