[GRASS-dev] r.slope.aspect: one pixel less in the output at the border shrinks region extent in further calculations
hellik at web.de
Sun Jan 4 01:23:02 PST 2015
Helmut Kudrnovsky wrote
> hi devs,
> I've added a script  with following calculations ideas:
> - do some calculations with r.slope.aspect output
> - coarse the resolution (but meet the DEM extent)
> - do some calculations with r.slope.aspect output at the coarser
> - coarse the resolution again (but meet the DEM extent)
> - do some calculations with r.slope.aspect output at the again coarser
> - combine all the results for some index calculation
> as the extent of the r.slope.aspect output is 1 pixel less then DEM input,
> the extent of the calculation output shrinks from one step to the next as
> the resolution is coarsening.
> any idea how to overcome such a shrinking?
for illustrating a screenshot (resolution coarsening: 30x30 -> 90x90 ->
in the screenshot: original extent of the input DEM and extent of the script
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