Re: [Geotools-gt2-users] create geotiff from shapefiles

[Michael B. <mic...@gm...>]

Hi Dmitry,

I wonder if this is actually a problem with the rasterizing process
rather than ImageWorker.

Does your shapefile include multipolygons with disjunct parts ?  I'll
need to check the code but it might not be allowing for this case.

Michael


On 12 October 2012 00:43, dementiev <dem...@gm...> wrote:
> I need to colorized geometries from shapefiles and convert them to raster
> image (geotiff).
>
> I tried to use geotools's VectorToRasterProcess and ImageWorker
> ("d:\gis\tmp\32 27 25 w4.shp" is path to my test shapefile):
>
> URL url =  new File("d:\\gis\\tmp\\32 27 25 w4.shp").toURI().toURL();
> ShapefileDataStore ds = new ShapefileDataStore(url);
> FeatureSource fs = ds.getFeatureSource("32%2027%2025%20w4");
>
> GridCoverage2D raster = VectorToRasterProcess.process(fs.getFeatures(),
>      "ID", new Dimension(400, 400), fs.getBounds(),"test", null);
>
> ImageWorker imageWorker = new ImageWorker(raster.getRenderedImage());
> imageWorker = imageWorker.rescaleToBytes();
> imageWorker.makeColorTransparent(Color.BLACK);
> imageWorker.forceComponentColorModel();
>
> raster = new GridCoverageFactory().create("one",
> imageWorker.getRenderedImage(),  fs.getBounds());
>
> GeoTiffWriter writer = new GeoTiffWriter(output);
> GeoTiffWriteParams params = new GeoTiffWriteParams();
> ParameterValue<GeoToolsWriteParams> value =
> GeoTiffFormat.GEOTOOLS_WRITE_PARAMS.createValue();
> value.setValue(params);
> writer.write(raster, new GeneralParameterValue[]{value});
> writer.dispose();
>
> The result geotiff is  here
> <https://www.evernote.com/shard/s114/sh/8f1788d8-9dd9-4b59-bccc-af7ea79043cc/50b04e24cfe668fe6e38835e068a1ff3?noteKey=50b04e24cfe668fe6e38835e068a1ff3&noteGuid=8f1788d8-9dd9-4b59-bccc-af7ea79043cc>
>
> What is not right in my configuration of ImageWorker? Give, please, some
> advices.
>
> Regards, Dmitry
>
>
>
> --
> View this message in context: http://osgeo-org.1560.n6.nabble.com/create-geotiff-from-shapefiles-tp5008043.html
> Sent from the geotools-gt2-users mailing list archive at Nabble.com.
>
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