[Qgis-user] Writing Python loop for Raster calculator

[Rainer M Krug]

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On 06/04/12 08:35, Swapnil Chaudhari 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.

One additional option would be R with the packages raster, maptools, et al.

Cheers,

Rainer

> 
> 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
> 
> 
> 
> _______________________________________________ Qgis-user mailing list 
> Qgis-user at lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user


- -- 
Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation Biology, UCT), Dipl. Phys.
(Germany)

Centre of Excellence for Invasion Biology
Stellenbosch University
South Africa

Tel :       +33 - (0)9 53 10 27 44
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email:      Rainer at krugs.de

Skype:      RMkrug
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