Re: [Geotools-gt2-users] GeoTiff rendering

[Andrea A. <and...@gm...>]

Hi Daniele,
at a first look it seems that you do not have the jai packages in the path.


Apart of that I paste a snip of code that Simone gave me to make things
work properly with geotiffs in both cases with worldfile or not:


        File tiffFile = new File(imagePath);
        AbstractGridCoverage2DReader rdr = null;
        if (geotiff)
            rdr = new GeoTiffReader(tiffFile);
        else
            rdr = new WorldImageReader(tiffFile);
        crs = rdr.getCrs();
        dataEnvelope = new ReferencedEnvelope(rdr.getOriginalEnvelope(),
crs);

        // between 0 and 255.
        StyleBuilder sb = new StyleBuilder();
        RasterSymbolizer rsDem = sb.createRasterSymbolizer();
        org.geotools.styling.Style demStyle = sb.createStyle(rsDem);

        // map
        map = new DefaultMapContext(crs);
        map.addLayer(rdr, demStyle);
        map.setCoordinateReferenceSystem(crs);
        map.setAreaOfInterest(dataEnvelope);
        mp.setMapArea(dataEnvelope);


As Simone states in a previous post, not the coverage, but the reader
should be passed to the context.

Regards,
Andrea



Daniele Bellandi wrote:
> Hi to all,
> I'm trying to render a GeoTiff file inside my JMapPane.
> I've encountered this exception: 
> 
>      Exception in thread "AWT-EventQueue-0"
> java.lang.NoClassDefFoundError:
>      com/sun/media/imageioimpl/plugins/tiff/TIFFImageReaderSpi
> 
> It is thrown when I try to create a GeoTiffFormat.
> This seems to be a problem connected with Jai, I've tried to install
> jai-1.1.2 or jai-1.1.3 but I've always the same problem.
> 
> This is the part of my code: 
> 
> File tiffFile = new File("pathGeoTiffFile");
> context = new DefaultMapContext(DefaultGeographicCRS.WGS84);
> GeoTiffFormat f_rdr = new GeoTiffFormat();
> GeoTiffReader rdr = (GeoTiffReader) f_rdr.getReader(tiffFile);
> GridCoverage2D tiffCov = (GridCoverage2D)rdr.read(null);
> StyleBuilder sb = new StyleBuilder();
> RasterSymbolizer rsDem = sb.createRasterSymbolizer();
> org.geotools.styling.Style demStyle = sb.createStyle(rsDem);
> context.addLayer(tiffCov, demStyle );
> 
> Is this the right way for loading geotiff? Or is better to use another way?
> 
> Thanks in advance,
> 
> Daniele 
> 
> 
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HydroloGIS - Environmental Safety Modelling
www.hydrologis.com

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Environmental Engineer
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"Let it be as much a great honour to take as to give learning,
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