Re: [gdal-dev] Calculate histogram using pyramids instead of tiff

2015-08-20 Thread Even Rouault
On Thursday 20 August 2015 18:18:28 aperi2007 wrote: > Hi Even, thx for hint. > > Is this possible using the python API ? Sure ds.GetRasterBand(1).GetHistogram(approx_ok = 1) Other keywords possible: min, max, buckets to define respectively the minimum value of the histogram, the maximum, and

Re: [gdal-dev] Calculate histogram using pyramids instead of tiff

2015-08-20 Thread aperi2007
Hi Even, thx for hint. Is this possible using the python API ? Thx , A. Il 20/08/2015 17:15, Even Rouault ha scritto: Not directly. At the API level, it is possible to require for approximate histogram (and this will select a overview level that is close to 1 / 50 th of the original raster s

Re: [gdal-dev] Calculate histogram using pyramids instead of tiff

2015-08-20 Thread Even Rouault
On Thursday 20 August 2015 16:47:16 Andrea Peri wrote: > Hi, > > I need to retrieve the histogram of a set of rasters. > To do this I use the > gdalinfo for every raster using the parameter "-hist". > > But this process take a long time because the rasters are huge and > have 11 bands each of the

[gdal-dev] Calculate histogram using pyramids instead of tiff

2015-08-20 Thread Andrea Peri
Hi, I need to retrieve the histogram of a set of rasters. To do this I use the gdalinfo for every raster using the parameter "-hist". But this process take a long time because the rasters are huge and have 11 bands each of them. For my need the histogram informations should be sufficient at a mi