I have a set of points and a set of polygons that are supposed to contain
the points. Unfortunately some of the points fall outside the polygons due
to data inaccuracy. What I would like to do is to establish a procedure
that would identify which polygon is closest to each point. I am quite
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-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
Sent: Wednesday, April 06, 2005 5:57 PM
To: mapinfo-l@lists.directionsmag.com
Subject: MI-L Distance calculation
I have a set of points and a set of polygons that are supposed
Group,
I have a question for you regarding distance calculations in MapInfo. I am
trying to find out the best way to determine how many points lie within a
x mile radius of a centralized point. I tried to do determine this
information 2 different ways in MapInfo, and received 2 different answers.
Could it be that some of the centroids lie outside the 5 mile range even
though thier objects may fall within it? The partially within part of
your query may be causing this. I would say the first method of using
the distance function is more accurate if you are concerned with exact
distances.
Mapinfo v. 6.5
I have a table that shows :-
Shell_id, Shell_Grid_Ref, Competitor_id, Competitor_Grid_Ref
Is it possible to create a Mapinfo query that will return the distances between each
Shell_Grid_Ref and its associated Competitor_Grid_Ref?
I do not currently have MapBasic but if I did
