[Qgis-user] [pyqgis] looping through a raster (andrea antonello)

[andrea antonello]

Hi Doug,

Why not call GRASS r.series through the python interface, average the stack
> of rasters there, then select the point value from the result. It's a bit
> brute force, but when I have used  r.series directly in GRASS with hundreds
> of large rasters at a time, there was fairly low memory usage.
>

thanks for the response. My example was really just to explain myself a bit
better.
The idea is to be able to just walk the raster, being it row by row, but
maybe also in a more morphologic way to follow certain terrain attributes
(could be flowdirections or particular slope attributes).
Currently I am putting this information together for teaching purposes. So
without relying on external modules or the processing toolbox, simply be
able to access raster data (and ideally also create a new raster).

Cheers,
Adrea



>
> Doug
>
>
> Doug Newcomb - Cartographer
> USFWS
> 551F Pylon Dr
> Raleigh, NC
> 919-856-4520 ext. 14 doug_newcomb at fws.gov
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