[GRASS-user] r.stream.extract: map mis-match error

Rich Shepard rshepard at appl-ecosys.com
Fri Apr 20 12:53:03 EDT 2012


On Fri, 20 Apr 2012, Markus Metz wrote:

> The resolution has been decreased, in this case several of the original
> cells fall into one new cell. A reasonably accurate new value can be
> obtained by using the average of all cells falling into a new cell. If on
> the contrary resolution is changed from e.g. 30 to 10 feet (increased),
> r.resamp.interp with bilinear or bicubic resampling would be a good
> choice.

Markus.

   Thank you for clarifying. I wasn't thinking about what happens to cells
when the resolution is made more coarse so I did not see the necessity of
running r.resamp.stats. Now I do.

Rich



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