Hi Chiu
If you're looking for Voronoi ... here some feedback: we compared TRIANGULATOR as
suggested by Roeland van der Spek and VM as suggested by James Harvie on a dataset
with over 200'000 points with the result that to my surprise TRIANGULATOR did the job
perfectly and incredibly fast and VM 2.1 and 2.5 didn't do the job at all (cryptic
error message) ... We went down to 50'000, tried, in VM, even to aggregate the points
beforehand, with the same result ... I hope that VM 2.6 will have solved this and
other problems, as it is basically a well designed and powerful product I really like
...
*********** REPLY SEPARATOR ***********
On 28.06.2000 at 15:18 James Harvie wrote:
>Chiu,
>
>Vertical Mapper has a natural neighbour analysis tool which generates a
>voronoi diagram (theissen polygons) from which density can be measured. The
>measure of density is based upon the area of each point's polygon where a
>small area indicates high density and a large area indicates lower density.
>
>James Harvie
>Vertical Mapper Product Manager
>Northwood Technologies Inc.
>43 Auriga Drive, K2E 7Y8
>Nepean, Ontario, Canada
>613-224-2020
>
>
>-----Original Message-----
>From: [EMAIL PROTECTED]
>[mailto:[EMAIL PROTECTED]]On Behalf Of Chiu Luk
>Sent: Tuesday, June 27, 2000 3:52 PM
>To: [EMAIL PROTECTED]
>Subject: MI Nearest Neighbor Analysis
>
>
>Hi everybody:
>
>Does anyone has ever written (or know who has written) a MapInfo routine on
>Nearest Neighbor Analysis to measure the extent of point clustering? Any
>hint to help me locate such resources is much appreciated. Thanks.
>
>
>Chiu LUK
>Policy & Research Section
>Urban Development Services
>City of Toronto
>
>Correspondence:
>Chiu Luk
>Urban Development Services
>East District Office, City of Toronto
>150 Borough Drive
>Scarborough Civic Centre
>Toronto, ON M1P 4N7
>
>Phone: (416) 396-7031
>Fax: (416) 396-4265
>E-mail: [EMAIL PROTECTED]
>
>
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