Hey guys,
can you help me?
I am trying to display a GridCoverage2D. But I am just getting a green area.
The whole grid is a green area. My code snippet looks like this:
public MapContext mapRasterBrowse(ArcInfoGridReader aigrid) {
// method to visualize grid coverage 2D
ascfile = getAscFile(aigrid);
gc2D = aigrid.inputGridCoverage(ascfile);
// create a new map context
MapContext mapRasterInput = new DefaultMapContext();
// set title of map
mapRasterInput.setTitle("Map of raster input");
// add layer to map
try {
style = createGreyscaleStyle();
mapRasterInput.addLayer(gc2D, style);
this.setRenderer(new StreamingRenderer());
this.setMapContext(mapRasterInput);
this.setDisplayArea(mapRasterInput.getLayerBounds());
} catch (Exception e1) {
// auto-generated catch block
e1.printStackTrace();
}
return mapRasterInput;
}
and creategrayscale from ImageLab:
/**
* create a style to display the GridCoverage2D as a greyscale layer
* @return a new style instance to render the image in greyscale
*/
private Style createGreyscaleStyle() {
sf = CommonFactoryFinder.getStyleFactory(null);
ff = CommonFactoryFinder.getFilterFactory2(null);
ContrastEnhancement ce = sf.contrastEnhancement(ff.literal(1.0),
ContrastMethod.NORMALIZE);
SelectedChannelType sct =
sf.createSelectedChannelType(String.valueOf(1),
ce);
RasterSymbolizer sym = sf.getDefaultRasterSymbolizer();
ChannelSelection sel = sf.channelSelection(sct);
sym.setChannelSelection(sel);
return SLD.wrapSymbolizers(sym);
}
there is no error, but i am just seeing a green area. Where is the problem?
Has anybody any idea?
thanks in advance
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