Il 15/07/2016 02:13, Sam Wilson ha scritto:
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?
Hi Sam,
if your input data are both of type Int*, you should force the output
datatype:
gdal_calc.py -A hour0.tif -B hour3.tif --outfile=hour1.tif
--calc="(A+B)*0.333" --type Float32
gdal_calc.py -A hour0.tif -B hour3.tif --outfile=hour2.tif
--calc="(A+B)*0.667" --type Float32
Hope this helps.
Cheers,
Antonio
--
Antonio Falciano
http://www.linkedin.com/in/antoniofalciano
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