[gdal-dev] gdal_calc.py floating point arithmetic
Sam Wilson
sam at surfline.com
Thu Jul 14 17:13:08 PDT 2016
Hi,
I’m attempting to linearly interpolate two geotiff files using gdal_calc.py. The geotiff files are 3 hours apart, so for example hour 0 and hour 3. I’d like to end up with hourly data, so I need hours 1 and 2.
Below are the commands I’m using:
gdal_calc.py -A hour0.tif -B hour3.tif —outfile=hour1.tif —calc=“(A+B)*0.333”
gdal_calc.py -A hour0.tif -B hour3.tif —outfile=hour2.tif —calc=“(A+B)*0.667”
However, hour1.tif and hour2.tif appear to be the exact same.
Does gdal_calc.py not allow using floating point values in the calculation? Or, am I doing something else wrong?
Many thanks.
Sam
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