On Thu, Apr 23, 2015 at 02:36:35PM +0200, Even Rouault wrote:
> Most gdaldem algorithms (except color-relief) need to compute some form of
> gradient (a 3x3 window around the pixel being computed), so you have edge
> effects. By default, they put a nodata value on the edges.
> If you specify -compute_edges, then they will interpolate extra values from
> the ones available so that the edge pixels can be computed. You could still
> see some discontinuity if the prediction isn't that great.
preliminary tests show that is enough. of course, I will need to do
more exhaustive tests to see if it's so. thanks for the tip :)
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