[udig-users] Getting raster data from a wms layer

[Devrim Baris Acar <devrimbaris@xxxxxxxxx>]

Hi,
I have setup a geoserver which serves  nasa srtm30 bathymetry elevation data(geotiff)  in pyramids.

I have added this as a wms layer to udig but stuck on the point to read the raster value on a mouse clicked point.


For a local geotiff file, the following code seems to work ok but I dont know what should I do for a wms layer as its georesource is not of GridCoverage2D class.

What should I do to access raster data values on a  wms (or wmsc) layer?


Best regards,
Devrim Baris Acar

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//works for local geotiff
public float getElevationOfPoint2(int x, int y) {

        ILayer layer = getContext().getMapLayers().get(0);


        GridCoverage2D geoRes = null;
        try {
            geoRes = (GridCoverage2D) layer.getGeoResource().resolve(
                    GridCoverage.class, new NullProgressMonitor());
        } catch (IOException e) {


            e.printStackTrace();
        }

        DirectPosition dp = new DirectPosition2D(geoRes.getCoordinateReferenceSystem(), start.x, start.y); // start is of type Coordinate
        int[] evaluate = (int[]) (geoRes.evaluate(dp));


        return new Float(evaluate[0]);

    }
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