Dear Paul,
I have found your PhD thesis excerpt very interesting: thanks for
sharing it.
Date: Tue, 12 Feb 2008 21:31:44 +0000 (GMT)
From: Paul Kelly <[EMAIL PROTECTED]>
Subject: Re: [GRASS-user] strange behaviour of v.surf.idw
To: "G. Allegri" <[EMAIL PROTECTED]>
Cc: grassuser <[email protected]>
Also, have you tried running using the -n flag (no indexing) and comparing
the results. I think they should be the same for all regions then but
might turn up something else interesting.
I started using v.surf.idw (for irregularly spaced points) in grass6.0
with no -n flag, then in 6.1 I noticed that the output raster changed
from what it used to be (i.e., some stair-like artifacts appeared) and
it was restored to the original look (i.e., a much smoother look) by
adding the -n flag. By looking at your PhD thesis excerpt, it looks like
the -n flag should only make the interpolation faster: I wonder if you
have any idea why there may be differences, as you also say above.
Kind regards,
Luigi
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