[Qgis-user] Writing Python loop for Raster calculator

[Nathan Woodrow]

You can try gdal_calc.py

http://smathermather.wordpress.com/2011/12/01/gdal_calc-py-raster-calculator-using-numby-functions/

- Nathan

On Fri, Apr 6, 2012 at 4:35 PM, Swapnil Chaudhari <swapsslan at gmail.com>wrote:

> Dear QGIS User Team,
>
> I have sets of grid files, corresponding to monthly mean temperature for
> few years.
>
> I am working on scaling the raw data and modifying the extent of output
> file from -180,180,-90,90 to -180,180,-60, 90.
>
> The process of doing this with Raster Calculator is straight and very
> simple, where you have to give raster calculation expression, output extent
> and name of output with its format.
> The scaling equation for doing so e.g. is, (cru_tmp_clim_1961-1970_05 at 1
> *0.51)-85
>
> Although very simple, its very time consuming since I have data for around
> 6 to 7 dacads.
>
> I would be very glad if some one can help me find the python script for
> doing this in loop. So that I can process whole directory in single go.
>
> In addition to that, I would also request you to inform mannaul, guide to
> learn python scripting for simple raster and vector operations.
>
> You efforts in helping with this is much appreciated.
>
> Thank you very much.
>
> Best,
>
> Swapnil
>   o__
>  _> /__
> (_) \(_)....... live healthy
>
>
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>
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