IMHO this is a deegree related problem, once you go from raw data to a rendered version is quite hard to go back to the original data, even knowing the style that was applied. If you asking a dem you should get numbers from WCS not colors.
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 Thu, Apr 30, 2009 at 10:29 AM, Martin Tomko <martin.to...@geo.uzh.ch> wrote: > Dear All, > I am reading an input from a WCS (a DEM served in output format GeoTiff, > the server is Deegree). From the WCS response I construct a > GridCoverage2D as follows: > (removed all error handling etc): > BufferedImage image = image = ImageIO.read(url); > WritableRaster inputRaster = image.getRaster(); > GridCoverageFactory gcFactory = new GridCoverageFactory(); > GridCoverage2D gc = gcFactory.create("inputraster", > inputRaster,refenv); > > The problem is that the returned Geotiff (and therefore the resulting > GridCoverage2D) has 4 bands (according to gdalinfo): > > C:\temp>gdalinfo services.tiff > Warning 1: GeoTIFF tags apparently corrupt, they are being ignored. > Driver: GTiff/GeoTIFF > Files: services.tiff > Size is 32, 23 > Coordinate System is `' > Origin = (7.144115994361721,46.002000642169747) > Pixel Size = (0.000805259045624,-0.000782660609417) > Image Structure Metadata: > INTERLEAVE=PIXEL > Corner Coordinates: > Upper Left ( 7.1441160, 46.0020006) > Lower Left ( 7.1441160, 45.9839994) > Upper Right ( 7.1698843, 46.0020006) > Lower Right ( 7.1698843, 45.9839994) > Center ( 7.1570001, 45.9930000) > Band 1 Block=32x8 Type=Byte, ColorInterp=Red > Band 2 Block=32x8 Type=Byte, ColorInterp=Green > Band 3 Block=32x8 Type=Byte, ColorInterp=Blue > Band 4 Block=32x8 Type=Byte, ColorInterp=Undefined > > I am wondering if it is at all possible to get back to the Geotiff DEM > values from the Red, Gren, Blue and undefined components of the response > geotiff. If yes, how? I was under the impression that WCSs should return > unprocessed (raw) values for a coverage, unless otherwise specified, and > we did not specify any symbolization on the WCS. > > Any hint welcome, including changing the output of the wcs used to a > different format. > Thanks, > Martin > > ------------------------------------------------------------------------------ > Register Now & Save for Velocity, the Web Performance & Operations > Conference from O'Reilly Media. Velocity features a full day of > expert-led, hands-on workshops and two days of sessions from industry > leaders in dedicated Performance & Operations tracks. Use code vel09scf > and Save an extra 15% before 5/3. http://p.sf.net/sfu/velocityconf > _______________________________________________ > Geotools-gt2-users mailing list > Geotools-gt2-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users > ------------------------------------------------------------------------------ Register Now & Save for Velocity, the Web Performance & Operations Conference from O'Reilly Media. Velocity features a full day of expert-led, hands-on workshops and two days of sessions from industry leaders in dedicated Performance & Operations tracks. Use code vel09scf and Save an extra 15% before 5/3. http://p.sf.net/sfu/velocityconf _______________________________________________ Geotools-gt2-users mailing list Geotools-gt2-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users
