[Freegis-list] Voronoi

[Paul Selormey]

Hello Thanh,
Thanks so much for the information. In fact, this is about all that I needed
on the topic. I will research on this further, at least I now know the
application.

Best regards,
Paul.

----- Original Message -----
From: "Thanh Le Phuoc" <thanhlp at cidala.gov.vn>
To: <freegis-list at intevation.de>
Sent: Wednesday, July 24, 2002 10:52 AM
Subject: [Freegis-list] Voronoi


> Dear Paul,
>
> As my knowledge, Voronoi used for creating TIN (Triangle Irigular Network)
> in GIS. This is a function of some GIS system, with this, you can creat
3D,
> or vitural terrain, contour interpolation...
>
> Best regards,
> Thanh Le Phuoc
>
> -----Original Message-----
> From: freegis-list-admin at intevation.de
> [mailto:freegis-list-admin at intevation.de]On Behalf Of
> freegis-list-request at intevation.de
> Sent: Tuesday, July 23, 2002 5:00 PM
> To: freegis-list at intevation.de
> Subject: Freegis-list digest, Vol 1 #408 - 4 msgs
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> Today's Topics:
>
>    1. Re: OT: Voronoi (Adrian Custer)
>    2. Re: OT: Voronoi (Paul Selormey)
>    3. Re: OT: Voronoi (Markus Neteler)
>    4. Re: OT: Voronoi (Paul Selormey)
>
> --__--__--
>
> Message: 1
> Subject: Re: [Freegis-list] OT: Voronoi
> From: Adrian Custer <acuster at nature.berkeley.edu>
> To: Paul Selormey <paul at toolscenter.org>
> Cc: FreeGIS list <freegis-list at intevation.de>
> Date: 22 Jul 2002 13:18:17 -0700
>
> Yours is way too vague a question.
>
> They are used extensively in all sorts of GIS applications, and in the
> algorithms used to do internal geometric calculations. Indeed, since
> they are a fundamental mathematical construct, it would be hard to make
> any GIS that did not in some way use them.
>
> good luck,
> adrian
>
> On Sun, 2002-07-21 at 22:01, Paul Selormey wrote:
> > Hello All,
> >
> > Just seeking knowledge. Anyone here uses Voronoi in GIS application?
> > What is the relevance of this or where/when is this used in GIS?
> >
> > Best regards,
> > Paul.
> >
> >
> >
> > _______________________________________________
> > Freegis-list mailing list
> > Freegis-list at intevation.de
> > https://intevation.de/mailman/listinfo/freegis-list
> >
>
>
>
>
> --__--__--
>
> Message: 2
> From: "Paul Selormey" <paul at toolscenter.org>
> To: "Adrian Custer" <acuster at nature.berkeley.edu>
> Cc: "FreeGIS list" <freegis-list at intevation.de>
> Subject: Re: [Freegis-list] OT: Voronoi
> Date: Tue, 23 Jul 2002 09:23:35 +0900
>
> > Yours is way too vague a question.
>
> Hmmm, may be I will have asked a better question if I knew
> what it is.
>
> > They are used extensively in all sorts of GIS applications, and in the
> > algorithms used to do internal geometric calculations. Indeed, since
> > they are a fundamental mathematical construct, it would be hard to make
> > any GIS that did not in some way use them.
>
> I have seen many GIS applications in the forum, and on the freegis.org
> pages.
> However, I am yet to find one which really uses the Voronoi algorithm. I
> came
> across this while reading the "dying" GFC library, and wishes to know
more.
> In fact, neither OpenEV, MapServer etc are using it so by your write up
you
> do not consider these are GIS applications?
>
> Please, I really need the help - which open source systems are using this
> algorithm
> so that I could find out more?
>
> Best regards,
> Paul.
>
>
>
>
> --__--__--
>
> Message: 3
> Date: Tue, 23 Jul 2002 09:49:47 +0200
> From: Markus Neteler <neteler at itc.it>
> To: Paul Selormey <paul at toolscenter.org>
> Cc: Adrian Custer <acuster at nature.berkeley.edu>,
> FreeGIS list <freegis-list at intevation.de>
> Subject: Re: [Freegis-list] OT: Voronoi
>
> On Tue, Jul 23, 2002 at 09:23:35AM +0900, Paul Selormey wrote:
> > > Yours is way too vague a question.
> >
> > Hmmm, may be I will have asked a better question if I knew
> > what it is.
> >
> > > They are used extensively in all sorts of GIS applications, and in the
> > > algorithms used to do internal geometric calculations. Indeed, since
> > > they are a fundamental mathematical construct, it would be hard to
make
> > > any GIS that did not in some way use them.
> >
> > I have seen many GIS applications in the forum, and on the freegis.org
> > pages.
> > However, I am yet to find one which really uses the Voronoi algorithm. I
> > came
> > across this while reading the "dying" GFC library, and wishes to know
> more.
> > In fact, neither OpenEV, MapServer etc are using it so by your write up
> you
> > do not consider these are GIS applications?
> >
> > Please, I really need the help - which open source systems are using
this
> > algorithm
> > so that I could find out more?
>
> Hi,
>
> GRASS is providing "s.voronoi":
> http://grass.itc.it/gdp/html_grass5/html/s.voronoi.html
>
> former versions were also providing "v.geom" but due to
> license problems this code was removed from GRASS.
>
> Source code is here:
> http://freegis.org/cgi-bin/viewcvs.cgi/grass/src/sites/s.voronoi/
> (or you download the full source code)
>
> Hope this helps,
>
>  Markus
>
>
> --__--__--
>
> Message: 4
> From: "Paul Selormey" <paul at toolscenter.org>
> To: "Markus Neteler" <neteler at itc.it>
> Cc: "Adrian Custer" <acuster at nature.berkeley.edu>,
> "FreeGIS list" <freegis-list at intevation.de>
> Subject: Re: [Freegis-list] OT: Voronoi
> Date: Tue, 23 Jul 2002 17:33:49 +0900
>
> Hello Markus,
> Thanks so much for the information.
>
> Best regards,
> Paul.
>
> ----- Original Message -----
> From: "Markus Neteler" <neteler at itc.it>
> To: "Paul Selormey" <paul at toolscenter.org>
> Cc: "Adrian Custer" <acuster at nature.berkeley.edu>; "FreeGIS list"
> <freegis-list at intevation.de>
> Sent: Tuesday, July 23, 2002 4:49 PM
> Subject: Re: [Freegis-list] OT: Voronoi
>
>
> > On Tue, Jul 23, 2002 at 09:23:35AM +0900, Paul Selormey wrote:
> > > > Yours is way too vague a question.
> > >
> > > Hmmm, may be I will have asked a better question if I knew
> > > what it is.
> > >
> > > > They are used extensively in all sorts of GIS applications, and in
the
> > > > algorithms used to do internal geometric calculations. Indeed, since
> > > > they are a fundamental mathematical construct, it would be hard to
> make
> > > > any GIS that did not in some way use them.
> > >
> > > I have seen many GIS applications in the forum, and on the freegis.org
> > > pages.
> > > However, I am yet to find one which really uses the Voronoi algorithm.
I
> > > came
> > > across this while reading the "dying" GFC library, and wishes to know
> more.
> > > In fact, neither OpenEV, MapServer etc are using it so by your write
up
> you
> > > do not consider these are GIS applications?
> > >
> > > Please, I really need the help - which open source systems are using
> this
> > > algorithm
> > > so that I could find out more?
> >
> > Hi,
> >
> > GRASS is providing "s.voronoi":
> > http://grass.itc.it/gdp/html_grass5/html/s.voronoi.html
> >
> > former versions were also providing "v.geom" but due to
> > license problems this code was removed from GRASS.
> >
> > Source code is here:
> > http://freegis.org/cgi-bin/viewcvs.cgi/grass/src/sites/s.voronoi/
> > (or you download the full source code)
> >
> > Hope this helps,
> >
> >  Markus
> >
>
>
>
>
> --__--__--
>
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