Hello Timon,
I don't use WMS so what follows may or may not be useful.
In general, you can draw a coverage into an image like this:
void drawCoverage(GridCoverage2D myCoverage,
Style myDisplayStyle,
ReferencedEnvelope worldEnv,
BufferedImage destImage) {
MapContent map = new MapContent();
map.addLayer( new GridCoverageLayer(myCoverage, myDisplayStyle) );
StreamingRenderer renderer = new StreamingRenderer();
renderer.setMapContent(map);
Graphics2D gr2D = destImage.createGraphics();
Rectangle paintArea = new Rectangle(
destImage.getMinX(), destImage.getMinY(),
destImage.getWidth(), destImage.getHeight());
renderer.paint(gr2D, paintArea, worldEnv);
}
The GeoTools imports for the above are:
import org.geotools.coverage.grid.GridCoverage2D;
import org.geotools.geometry.jts.ReferencedEnvelope;
import org.geotools.map.GridCoverageLayer;
import org.geotools.map.MapContent;
import org.geotools.renderer.lite.StreamingRenderer;
import org.geotools.styling.Style;
The tricky bit is creating the appropriate Style object - at least I
find that tricky. However, there is a nice Geoserver page about raster
styles (as SLD docs) if you haven't already seen it:
http://docs.geoserver.org/stable/en/user/styling/sld-cookbook/rasters.html
There is also the GeoTools Image tutorial which includes code for
creating two simple styles programmatically:
http://docs.geotools.org/latest/userguide/tutorial/raster/image.html#displaying-the-map
(scroll down a little to see the Style code)
Hope that helps.
Michael
On 18 June 2012 15:53, Timon Kirschke <[email protected]> wrote:
> Hey,
> I am currently trying to extend Geoserver with my own WMS and i just
> want to ask for a little help.
> My biggest Problem is, how to create a map from a BufferedImage.
> So my attemp is to create a GridCoverage2D with an Envelope and the
> CoordinateReferenceSystem and then
> somehow render it.
>
>
> Perhaps someone can give me a few advices, because i am really new to
> Geootools.
>
> Timon
>
> PS. Sorry for my really poor english. If there are any questions, I
> will try to answer them as soon as possible.
>
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