Re: [gdal-dev] gdal_calc.py and NoData issues

2014-11-20 Thread Graeme B. Bell
Andreas, >it turns out that all pixel values with 255 are now nodata values ;-( Is >there an option so that my 255 values are not turned into nodata? I >tested with the --NoDataValue option (e.g. 99 - which I don't use in the >image), but it seems to be ignored. For me it is important that blac

Re: [gdal-dev] gdal_calc.py and NoData issues

2014-11-19 Thread Andreas Neumann
Hi Simen, <> means not - same as != Andreas Am 2014-11-19 15:09, schrieb Simen Langseth: I saw the symbol <> first time in gdal calc what is meaning of it? Thanks On Wed, Nov 19, 2014 at 10:21 PM, Even Rouault wrote: Le mercredi 19 novembre 2014 14:16:05, Andreas Neumann a écrit : Hi Eve

Re: [gdal-dev] gdal_calc.py and NoData issues

2014-11-19 Thread Simen Langseth
I saw the symbol <> first time in gdal calc what is meaning of it? Thanks On Wed, Nov 19, 2014 at 10:21 PM, Even Rouault wrote: > Le mercredi 19 novembre 2014 14:16:05, Andreas Neumann a écrit : > > Hi Even, > > > > Thank you for trying to help. Unfortunately, the --overwrite option does > > no

Re: [gdal-dev] gdal_calc.py and NoData issues

2014-11-19 Thread Andreas Neumann
oh - sorry. This helps. Correct syntax is: gdal_calc.py -A test.tif --overwrite --NoDataValue=99 --outfile=testcalc.tif --calc="(A==249)*255+(A<>249)*A" Thanks a lot! Andreas Am 2014-11-19 14:21, schrieb Even Rouault: Le mercredi 19 novembre 2014 14:16:05, Andreas Neumann a écrit : Hi Even

Re: [gdal-dev] gdal_calc.py and NoData issues

2014-11-19 Thread Even Rouault
Le mercredi 19 novembre 2014 14:16:05, Andreas Neumann a écrit : > Hi Even, > > Thank you for trying to help. Unfortunately, the --overwrite option does > not help. > > I have a very small test file at http://webgis.uster.ch/temp/test.tif > > I used the following options: > > gdal_calc.py -A te

Re: [gdal-dev] gdal_calc.py and NoData issues

2014-11-19 Thread Even Rouault
Le mercredi 19 novembre 2014 13:49:48, Andreas Neumann a écrit : > Hi, > > I have an issue with gdal_calc.py and nodata values. > > My input data contains a lot of white pixels. After running gdal_calc.py > with the following parameters > > gdal_calc.py -A test.tif --outfile=testcalc.tif > --cal

[gdal-dev] gdal_calc.py and NoData issues

2014-11-19 Thread Andreas Neumann
Hi, I have an issue with gdal_calc.py and nodata values. My input data contains a lot of white pixels. After running gdal_calc.py with the following parameters gdal_calc.py -A test.tif --outfile=testcalc.tif --calc="(A==249)*255+(A<>249)*A" it turns out that all pixel values with 255 are n