[Openspace] Dataset that blows up Thiessen Polygons routine

[Julia Koschinsky]

Tim,

Make sure your 35 points do not have identical x-y coordinates. We often
encounter the problem you are describing when that is the case (e.g., when
two apartment residents share the same address or you are working with the
same addresses over time).

If this is the case, change the last decimal points of your x or y to make
them unique. If this does not take care of the problem, email me your file,
and I'll look at it.

Julia

-----Original Message-----
From: openspace-bounces at agec144.agecon.uiuc.edu
[mailto:openspace-bounces at agec144.agecon.uiuc.edu]On Behalf Of Glover,
Tim
Sent: Thursday, January 27, 2005 2:26 PM
To: openspace at agec144.agecon.uiuc.edu
Subject: [Openspace] Dataset that blows up Thiessen Polygons routine


I've got a 35 point data set with which I've tried to generate Thiessen
polygons.  After setting up input and output shape file names, I click
on "create" and GeoDa disappears - the process is terminated without an
error message!  I've tried the same thing with the Baltimore data set
(as in the manual) and all works fine, so I'm sure it is my data set.
Would someone like a copy of the data file so an appropriate error
message can be crafted?


Tim Glover
Senior Environmental Scientist - Geochemistry
Geoenvironmental Department
MACTEC Engineering and Consulting, Inc.
Kennesaw, Georgia, USA
Office 770-421-3310
Fax 770-421-3486
Email ntglover at mactec.com
Web www.mactec.com

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