hello
I wonder how I can smooth polygon lines ?
regards
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Ahmet Temiz
Jeoloji Müh.
Afet Ýþleri Genel Müdürlüðü
Deprem Araþtýrma Dairesi
Tel: (312) 287 89 51 veya (312) 287 26 80/1547
Faks: (312) 287 89 51
E. Posta: temiz@deprem.gov.tr
www.deprem.gov.tr
Ahmet Temiz
Geological Eng.
General Directorate of Disaster Affairs
Earthquake Research Department
Phone: +90 (312) 287 89 51 or (312) 287 26 80/1547
Fax: +90 (312) 287 89 51
E. Mail: temiz@deprem.gov.tr
www.deprem.gov.tr
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On Mon, 19 Jun 2006 11:07:07 +0300
orkun <temiz@deprem.gov.tr> wrote:
hello
I wonder how I can smooth polygon lines ?
I don't think it is possible in Grass 6. In Grass 5 there was such a
function in the v.digit. It'd be nice to have it in Grass 6 too, as a
standalone module (for nice cartography eg.).
Maciek
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Maciek Sieczka wrote on 06/19/2006 03:35 PM:
On Mon, 19 Jun 2006 11:07:07 +0300
orkun <temiz@deprem.gov.tr> wrote:
hello
I wonder how I can smooth polygon lines ?
I don't think it is possible in Grass 6. In Grass 5 there was such a
function in the v.digit. It'd be nice to have it in Grass 6 too, as a
standalone module (for nice cartography eg.).
Maciek
Yes, it would be nice to get the function
src/mapdev/v.digit/spline.c
migrated from GRASS 5-CVS to GRASS 6 as
lib/vect/Vlib/spline.c
and add that as tool to v.clean or a new command v.smooth.
Markus
Maciek and list,
Wouldn´t you get smoother lines with the prune option of v.clean?
I've never used this option before but reading from the manual it says:
"prune: remove vertices in threshold from lines and boundaries, boundary is
pruned only if topology is not damaged (new intersection, changed
attachement of centroid), first and last segment of the boundary is never
changed".
Playing with the threshold might acomplished what you are looking for or Am
I missing something here?
Jonathan Aguero Valverde
-----Original Message-----
From: grassuser-bounces@grass.itc.it [mailto:grassuser-bounces@grass.itc.it]
On Behalf Of Maciek Sieczka
Sent: Monday, June 19, 2006 9:35 AM
To: orkun
Cc: grassuser@grass.itc.it
Subject: Re: [GRASS-user] smoothing polygon lines
On Mon, 19 Jun 2006 11:07:07 +0300
orkun <temiz@deprem.gov.tr> wrote:
hello
I wonder how I can smooth polygon lines ?
I don't think it is possible in Grass 6. In Grass 5 there was such a
function in the v.digit. It'd be nice to have it in Grass 6 too, as a
standalone module (for nice cartography eg.).
Maciek
------------------------------------------------------------------------
CIEP?E KRAJE - CIEP?E MORZA. Szukasz atrakcyjnego wypoczynku w przyst?pnej
cenie, zapoznaj si? z nasz? ofert?.
ZAPRASZAMY
www.skarpatravel.pl
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On Mon, 19 Jun 2006 11:07:23 -0400
"Jonathan Aguero" <jua130@psu.edu> wrote:
Maciek and list,
Wouldn´t you get smoother lines with the prune option of v.clean?
I've never used this option before but reading from the manual it
says: "prune: remove vertices in threshold from lines and boundaries,
boundary is pruned only if topology is not damaged (new intersection,
changed attachement of centroid), first and last segment of the
boundary is never changed".
Playing with the threshold might acomplished what you are looking for
Not really. The smoothing we (I, at least) mean is creating a line
which goes through each original line vertex *and* through plenty
additional vertices, for the line to be smooth and close to original in
the same time. That's what splines mostly do, which Markus mentioned
in the thread.
Maciek
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CIEP£E KRAJE - CIEP£E MORZA. Szukasz atrakcyjnego wypoczynku w przystêpnej cenie, zapoznaj siê z nasz± ofert±.
ZAPRASZAMY
www.skarpatravel.pl