Maciej Sieczka wrote:
Luigi Ponti wrote:
Maciej Sieczka wrote:
Luigi Ponti wrote:
It sounds feasible to add this functionality to r.surf.nnbathy, but
I don't know if the approach is correct from the GIS point of view
(i.e., mixing two interpolation methods) or even more useful/better
than just using IDW for the whole region.
It is possible to add such a functionality to r.surf.nnbathy, but I'd
rather leave it to the user to enhance his input raster the way he
prefers to, if necessary. Different interpolation methods or additional
data sources can be used to add the 4 corner points in question.
Cheers
Maciek
Thanks Maciek,
Any pointer to getting the four corners? Maybe they are already there,
i.e. the code that sets the working region for nnbathy?
# set the working region for nnbathy (it's cell-center oriented)
nn_n=`echo $n | awk -v res="$nsres" '{printf "%.8f",$1-res/2.0}'`
nn_s=`echo $s | awk -v res="$nsres" '{printf "%.8f",$1+res/2.0}'`
nn_w=`echo $w | awk -v res="$ewres" '{printf "%.8f",$1+res/2.0}'`
nn_e=`echo $e | awk -v res="$ewres" '{printf "%.8f",$1-res/2.0}'`
Though I don't entirely understand what it does, it seems to be getting
the coordinates of the center of cells located at the 4 corners of the
region.
Thanks again and regards,
Luigi
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