Re: [gdal-dev] Changing pixel values of GDAL VRT

2016-01-07 Thread Even Rouault
Le jeudi 07 janvier 2016 10:51:00, cl a écrit : > When use the nearblack tool I get: ERROR 1: Writing through > VRTSourcedRasterBand is not supported. Yes that's what I implied with my previous answer. nearblack only works on "plain" output datasets with full random read-write capabilities (typic

Re: [gdal-dev] Changing pixel values of GDAL VRT

2015-12-15 Thread Even Rouault
Le mardi 15 décembre 2015 17:23:44, cl a écrit : > Is it possible to manipulate the pixel values of a GDAL VRT and, if so, > how? The original data must remain unchanged. > > I have a dataset which might be a bit rotated so that there are no data > values on the edges. I use region growing to find

[gdal-dev] Changing pixel values of GDAL VRT

2015-12-15 Thread cl
Is it possible to manipulate the pixel values of a GDAL VRT and, if so, how? The original data must remain unchanged. I have a dataset which might be a bit rotated so that there are no data values on the edges. I use region growing to find that parts on the edge to not touch no data values in the