Dear Simone, Martin, yes, it is unfortunate - but while I will push for a change of the server, it is not a solution in the short term (deadlines!). Simone, if you have a simple code to do the shifting, please, could you share it? I tried searching for something like that, but I am not confident enough that I got it right. I would first coverage.evaluate to get the byte[] with the values for all the bands, and then somehow couple them togethe using something like: java.nio.ByteBuffer buf = ByteBuffer.wrap(b); return buf.getFloat();
Is it correct? Cheers Martin Simone Giannecchini wrote: > Ciao Martin, > please read below... > > ------------------------------------------------------- > 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 11:28 AM, Martin Tomko <martin.to...@geo.uzh.ch> > wrote: > >> Hi Martin,. Simone, >> I have asked at the deegree list, and this is the response I got from >> Andreas: >> >> <quote> >> this is the way the WCS works. >> One reason for this is Java or better >> ImageIO, JAI and Batik which are used by deegree for handling TIFFs. >> According to these libs it is possible to create a one band TIFF with >> FLOAT or DOUBLE data type but you can't read them with these libs. This >> may sounds strange but unfortunately it is like this (if somebody knows >> a solution we would be gratefull). Therefore we use a four band TIFF >> where each byte of a float value (e.g. DEM) is written to one of the >> bands. An application can read the TIFF as image an reconstruct the >> float values by combining the four bytes of each pixel. >> </quote> >> > > I guess I need to subscribe to the deegree ml and tell them about > imageio-ext, where we fixed those problems :-). > > > >> I asked for a more exact specification of the transformation. I have >> personally NO experience with handling colors in such situations, and I >> hope that a solution is possible - we are sort of dependent on the WCS... >> Martin >> > > Well, if you can, I would switch to geoserver or mapserver for wcs, > you should not have these problems. > If you *have* to use deegree you need to reconstruct the correct > geotiff, pixel by pixel, but this highly not standard. > If you want the code to go from 4 bytes to float or from 8 bytes to > double I can pass it over. > > Simone. > > > >> Simone Giannecchini wrote: >> >>> Ciao, >>> michael, Id' take into account that much probably the RGBA data was >>> created using a colormap like approach, hence band combination won't >>> do, unfortunately. >>> I guess that the point is understanding why the data became RGBA at >>> the WCS stage when the suorce data was a dem. >>> >>> Of course, this is mho :-) >>> >>> 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 11:03 AM, Michael Bedward >>> <michael.bedw...@gmail.com> wrote: >>> >>> >>>> Hi Martin, >>>> >>>> I can't help at all with the WCS aspect of this question (I know >>>> nothing) but as to converting the coverage you have into a single band >>>> version (as a last resort solution): if you know the details of the >>>> calculation used to create the four bands you can run that in reverse >>>> with a JAI BandCombine operation. >>>> >>>> Michael >>>> >>>> ------------------------------------------------------------------------------ >>>> 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 >>>> >>>> >>>> >>> >>> >> -- >> Martin Tomko >> Postdoctoral Research Assistant >> >> Geographic Information Systems Division >> Department of Geography >> University of Zurich - Irchel >> Winterthurerstr. 190 >> CH-8057 Zurich, Switzerland >> >> email: martin.to...@geo.uzh.ch >> site: http://www.geo.uzh.ch/~mtomko >> mob: +41-788 629 558 >> tel: +41-44-6355256 >> fax: +41-44-6356848 >> >> >> ------------------------------------------------------------------------------ >> 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 >> >> > > > -- Martin Tomko Postdoctoral Research Assistant Geographic Information Systems Division Department of Geography University of Zurich - Irchel Winterthurerstr. 190 CH-8057 Zurich, Switzerland email: martin.to...@geo.uzh.ch site: http://www.geo.uzh.ch/~mtomko mob: +41-788 629 558 tel: +41-44-6355256 fax: +41-44-6356848 ------------------------------------------------------------------------------ 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
