Hi Daniele, thanks for the suggestion, this is similar what the deegree people suggested too. No luck, I could not get the correct values out. We are adding Geoserver to our architecture now, which will solve many other issues too. And will serve single banded geotiffs.
Cheers M. Daniele Romagnoli wrote: > Hi Martin, > on the following link there is some code which allows you to handle 4 > bytes as a float and 8 bytes as a double. > > http://pastebin.com/m58d7f133 > > Regards, > Daniele > > > On Thu, Apr 30, 2009 at 12:19 PM, Martin Tomko > <martin.to...@geo.uzh.ch <mailto:martin.to...@geo.uzh.ch>> wrote: > > 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 <mailto: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 <mailto: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 > <mailto: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 <mailto:martin.to...@geo.uzh.ch> > >> site: http://www.geo.uzh.ch/~mtomko > <http://www.geo.uzh.ch/%7Emtomko> > >> 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 > <mailto: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 <mailto:martin.to...@geo.uzh.ch> > site: http://www.geo.uzh.ch/~mtomko > <http://www.geo.uzh.ch/%7Emtomko> > 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 > <mailto:Geotools-gt2-users@lists.sourceforge.net> > https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users > > > > > -- > ------------------------------------------------------- > Eng. Daniele Romagnoli > Software Engineer > > GeoSolutions S.A.S. > Via Carignoni 51 > 55041 Camaiore (LU) > Italy > > phone: +39 0584983027 > fax: +39 0584983027 > mob: +39 328 0559267 > > > http://www.geo-solutions.it > > ------------------------------------------------------- > -- 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. 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