It is a known bug in imageio tiff support see https://jai-imageio-core.dev.java.net/issues/show_bug.cgi?id=180. It's been fixed in imageio-ext, we should be able to include the fix in the next release of geotools.
Simone. ------------------------------------------------------- Ing. Simone Giannecchini GeoSolutions S.A.S. Owner - Software Engineer Via Carignoni 51 55041 Camaiore (LU) Italy phone: +39 0584983027 fax: +39 0584983027 mob: +39 333 8128928 http://www.geo-solutions.it http://simboss.blogspot.com/ http://www.linkedin.com/in/simonegiannecchini ------------------------------------------------------- On Mon, Feb 2, 2009 at 2:04 PM, andrea antonello <[email protected]> wrote: > I know this topic has been touched many times, but browsing all those > email, I couldn't find a solution to my problem. > > I have a gridcoverage and want to write it to disk as a floating point > values tiff, let's say an temperature map. > > So I go like: > > GridCoverage2D geoCoverage = coverage2D.view(ViewType.GEOPHYSICS); > RenderedImage renderedImage = geoCoverage.getRenderedImage(); > File tmpTiff = File.createTempFile("jgrass_", ".tiff"); > GeoTiffWriter writer = new GeoTiffWriter(tmpTiff); > writer.write(geoCoverage, null); > > The result I get is a transparent tiff, which seems to hold some data. > > The thing that now makes me wonder is that even if the coverage > contains a floating point reference: > > ...sampleModel=ComponentSampleModelJAI: dataType=5 numBands=1 > width=322 height=298 bandOffsets=[ 0 ] > colorModel=FloatDoubleColorModel: ColorModel: #pixelBits = 64 > > when I do a gdalinfo on the created tiff, I see at the end: > > "Band 1 Block=322x8 Type=Int32, ColorInterp=Gray > Computed Min/Max=0.000,19.000" > > The type is Int32. > what do I have to do to get it writing my temperatures in floating point? > > Thanks for any hint, > Andrea > > ------------------------------------------------------------------------------ > This SF.net email is sponsored by: > SourcForge Community > SourceForge wants to tell your story. > http://p.sf.net/sfu/sf-spreadtheword > _______________________________________________ > Geotools-gt2-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users > ------------------------------------------------------------------------------ This SF.net email is sponsored by: SourcForge Community SourceForge wants to tell your story. http://p.sf.net/sfu/sf-spreadtheword _______________________________________________ Geotools-gt2-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users
