On Wed, Jul 30, 2014 at 1:23 PM, Belén <[email protected]> wrote: > Hi again, > I tried yesterday the option "-ot UInt16" but the result was the same. > > This is the result os executing "gdalinfo -stats": > > > Driver: EHdr/ESRI .hdr Labelled > Files: prueba.bil > prueba.hdr > prueba.stx > > Size is 4000, 4000 > Coordinate System is `' > Origin = (504815.000000000000000,4766395.000000000000000) > Pixel Size = (10.000000000000000,-10.000000000000000) > Corner Coordinates: > Upper Left ( 504815.000, 4766395.000) > Lower Left ( 504815.000, 4726395.000) > Upper Right ( 544815.000, 4766395.000) > Lower Right ( 544815.000, 4726395.000) > Center ( 524815.000, 4746395.000) > Band 1 Block=4000x1 Type=UInt16, ColorInterp=Undefined > Min=87.000 Max=263.000 > Minimum=87.000, Maximum=263.000, Mean=220.726, StdDev=23.721 > > You gave me a great idea, I think PNG supports UInt16 but I'v tried using > -ot BYTE and it works. > Thanks you very very much for your help. You saved my life!! >
Cool! Note that using -ot BYTE without some scaling may truncate your values: max = 263 which is greater than 255 (the max byte you can represent) Cheers, Daniele > > Regards. > Belén Muñoz. > > ------------------------------ > From: [email protected] > Date: Wed, 30 Jul 2014 12:58:44 +0200 > > Subject: Re: [gdal-dev] Problem with BIL files and GDAL > To: [email protected] > CC: [email protected] > > Hi, > Since we are here, you could re-run gdalinfo -stats on your dataset. > (Maybe you see a black image due to a dynamic concentrated on low values). > Moreover you may consider using the "-scale" option on gdal_translate to > scale your values to byte or make sure to preserve the output type with the > option "-OT UInt16". > Honestly, I don't remember if PNG support 16 bits (But would say "yes") > and if the tool/browser/what else you will use to open it will show you > correctly. > > Hope this helps. > Regards, > Daniele > > == > GeoServer Professional Services from the experts! Visit > http://goo.gl/NWWaa2 for more information. > == > > Ing. Daniele Romagnoli > Senior Software Engineer > > GeoSolutions S.A.S. > Via Poggio alle Viti 1187 > 55054 Massarosa (LU) > Italy > phone: +39 0584 962313 > fax: +39 0584 1660272 > > http://www.geo-solutions.it > http://twitter.com/geosolutions_it > > ------------------------------------------------------- > > > On Wed, Jul 30, 2014 at 12:26 PM, Belén <[email protected]> wrote: > > Hi Daniele, > Thank you for your answer. > This is the output of gdalinfo: > > Driver: EHdr/ESRI .hdr Labelled > Files: prueba.bil > prueba.hdr > Size is 4000, 4000 > Coordinate System is `' > Origin = (504815.000000000000000,4766395.000000000000000) > Pixel Size = (10.000000000000000,-10.000000000000000) > Corner Coordinates: > Upper Left ( 504815.000, 4766395.000) > Lower Left ( 504815.000, 4726395.000) > Upper Right ( 544815.000, 4766395.000) > Lower Right ( 544815.000, 4726395.000) > Center ( 524815.000, 4746395.000) > Band 1 Block=4000x1 Type=UInt16, ColorInterp=Undefined > > Thank you again!! > > Regards. > Belén Muñoz. > > ------------------------------ > From: [email protected] > Date: Wed, 30 Jul 2014 12:20:09 +0200 > Subject: Re: [gdal-dev] Problem with BIL files and GDAL > To: [email protected] > CC: [email protected] > > > Hi, > could you run a gdalinfo on your origin file and provide us the output? > Wondering if its datatype is float and a straight gdal_translate (without > scaling applied) truncate all values when going to Byte PNG. > > Cheers, > Daniele > > == > GeoServer Professional Services from the experts! Visit > http://goo.gl/NWWaa2 for more information. > == > > Ing. Daniele Romagnoli > Senior Software Engineer > > GeoSolutions S.A.S. > Via Poggio alle Viti 1187 > 55054 Massarosa (LU) > Italy > phone: +39 0584 962313 > fax: +39 0584 1660272 > > http://www.geo-solutions.it > http://twitter.com/geosolutions_it > > ------------------------------------------------------- > > > On Wed, Jul 30, 2014 at 11:22 AM, Belén <[email protected]> wrote: > > Hello! > My name is Belén and i'm trying to convert a .bil file (.bil and .hdr) to > a .png using gdal_translate, it seems to work fine, there are no error > messages but when I open the .png file, I only have a big completely black > square. > There's some special thing I should be doing? I'd appreciate any help, > because I'm completely lost. > > Thank you very much in advance. > > Regards. > > Belén Muñoz. > > _______________________________________________ > gdal-dev mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/gdal-dev > > > >
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