Hello, I posted the same question on the geotools-user-list and Michael Bedward responded as follows
"However, I suggest you pose the same question on the JTS list where Martin Davis and the other geometric gurus might be able to help." So here is my message... I painted a small Graphic that should help to understand my current problem (I didn't want to post it on the mailing list directly) Here is the Link to the graphic. http://bayimg.com/oaNDJAaBn I created a GridCoverage with a specified cellsize to rasterize an area double width = envelope.getWidth(); // i.e. 1000m double height = envelope.getHeight(); // i.e. 1000m int numCellX = (int) Math.floor( width / cellSize ); // cellSize i.e. 10m int numCellY = (int) Math.floor( height / cellSize ); WritableRaster raster = RasterFactory.createBandedRaster( DataBuffer.TYPE_FLOAT, numCellX, numCellY, 1, null ); GridCoverage2D gridCoverage = factory.create( "My coverage", raster, envelope ); Now my Problem: The values of a cell in the raster depends on the length of the LineString covering the cell. (in my Image the green part of the LineString would determine the value of d;2) I belive that their is no function available doing that. So my idea to solve my problem is some workaround I'm not really satisfied with. 1.create a graph corresponding to the raster (width, height and cellsize) 2.for a given LineString find all intersection points with the created graph 3.for all following intersection points (i, i+1) a.calculate the length -> value for the cell b.get the middle point between (i, i+1) to find the corresponding cell c.add value to cell Maybe somebody has a smarter idea to solve my problem. Thanks Pete here is the link to my posting on the geotools-mailing-list http://n2.nabble.com/Intersections-of-cells-in-a-GridCoverage-with-a-LineString-td2405815.html
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