Pat Leblanc, P.Eng.
Water Resources Engineer
Infrastructure Services Branch
Transportation, Utilities & Public Works
City of Ottawa
(613) 580-2424 ext. 26708
(613) 560-6071 (fax)
[EMAIL PROTECTED]
-----Original Message-----
From: Leblanc, Patrick
Sent: Thursday, February 21, 2002 12:25 PM
To: 'Uffe Kousgaard'
Subject: RE: MI-L Theissen Polygons in MapBasic
Natural Neighbour regions (or Voronoi Diagrams) are easily created within
Vertical Mapper, by Northwood Technology (Now owned by Marconi). I use
Vertical Mapper extensively (An add-on for MapInfo) for digital terrain
mapping, which supports various interpolation methods such as triangulation,
inverse distance weighting, natural neighbour, rectangular, kriging and
custom point estimation. This software is a must in any GIS or engineering
shop. I hope this is what you were looking for.
Pat Leblanc, P.Eng.
Water Resources Engineer
Infrastructure Services Branch
Transportation, Utilities & Public Works
City of Ottawa
(613) 580-2424 ext. 26708
(613) 560-6071 (fax)
[EMAIL PROTECTED]
-----Original Message-----
From: Uffe Kousgaard [mailto:[EMAIL PROTECTED]]
Sent: Thursday, February 21, 2002 12:04 PM
To: Mapinfo-L
Subject: Re: MI-L Theissen Polygons in MapBasic
MapBasic is one of the slowest langauges available and not well suited
for such a computation intensive task. But I can't think of anything
which should make it impossible. But you would have to stick to small
datasets since mapbasic only supports rather small datasets. Or perhaps
calculation time / lack of patience becomes the limiting factor.
Thiessen polygons are also known as Voronoi polygons or natural
neighborhood. You can find it included in ToolBox from RouteWare.
Kind regards
Uffe Kousgaard
www.routeware.dk
----- Original Message -----
From: "Thomas Finan" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Thursday, February 21, 2002 5:28 PM
Subject: MI-L Theissen Polygons in MapBasic
> Has anyone ever been able to write a MapBasic application that can
create
> Theissen polygons? I know there are applications out there that can
do
> this, but I was just wondering if anyone has experimented with the
idea, or
> whether it would even be feasible.
>
> Thanks.
>
> Tom Finan
>
>
> --
> Dr. Thomas Finan
> Department of History
> Webster University
> 470 East Lockwood Ave.
> St. Louis, MO 63119
> USA
> [EMAIL PROTECTED]
>
>
>
>
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