Thank you to all responders! This list has always proven to be a great
help.
I think that Bj�rn's recommendation will get me the number of overlaps
in my messy table.
(The Objects>Check Regions showed me overlaps in general, but not
specifically how many overlaps).
Thanks again,
Erin Rubio
Spatial Insights, Inc.
A Geographic Information Services Company
8221 Old Courthouse Road Suite 203 Vienna, VA 22182
Tel: 703-827-7034 Fax: 703-827-7037
Sales: 800-347-5291
[EMAIL PROTECTED] www.spatialinsights.com
-----Original Message-----
From: Grasnick, Bj�rn [mailto:[EMAIL PROTECTED]]
Sent: Thursday, January 25, 2001 2:46 AM
To: Erin Rubio; MapInfo-L
Subject: AW: MI-L overlap of 3 or more polygons
Hi Erin,
one thing that might do what you want is the following:
Save and open a copy of your original table. Do this query:
Fields {table.id, count(*)}
Tables {table, copyoftable}
Where {table.Obj Intersects copyoftable.Obj}
Group {table.id}
Order {}
Into {Selection}
Browse
(That's what a saved query template looks like in a text editor).
You get a list of object identificators and a count of how many
intersections could be done. The count is three if one object intersects
two
(different) others plus itself in the copied table, which is, I think,
what
you wanted to find out.
Hope this helps,
Bjoern
-----Urspr�ngliche Nachricht-----
Von: Erin Rubio [mailto:[EMAIL PROTECTED]]
Gesendet am: Mittwoch, 24. Januar 2001 23:29
An: MapInfo-L
Betreff: MI-L overlap of 3 or more polygons
Hi Listers,
I'm trying to identify areas that have 3 or more areas overlapped on top
of one another.
Any assistance would be greatly appreciated.
Thanks in advance for your help!
Erin Rubio
Spatial Insights, Inc.
A Geographic Information Services Company
8221 Old Courthouse Road Suite 203 Vienna, VA 22182
Tel: 703-827-7034 Fax: 703-827-7037
Sales: 800-347-5291
[EMAIL PROTECTED] www.spatialinsights.com
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