[Gdal-dev] Gdal + python for map algebra script?

Dylan Beaudette dylan.beaudette at gmail.com
Tue Jan 9 20:49:43 EST 2007

On Tuesday 09 January 2007 14:36, Webb Sprague wrote:
> Hi all,
> I would like to use python gdal to write some simple raster analysis
> scripts, but I am having a hard time getting started or knowing where
> to get started.
> My basic idea:  (1) delimit a single band raster file with a vector
> polygon, (2) calculate the mean ("m") and stdev ("s") for the pixels
> the area, (3) normalize each pixel within the polygon by subtracting m
> and dviding by s, (4) writing out the new raster file, with
> modifications within the delimiting polygon.
> I would like a command line tool with filename as input (that is easy).
> If someone could point me to a tutorial or something that would be great.
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Hi again Webb,

I highly recommend GRASS and starspan for these types of analysis. Check 
around in the archives for the GDAL and GRASS lists for some fun examples.


Dylan Beaudette
Soils and Biogeochemistry Graduate Group
University of California at Davis

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