Thanks much Alex.........  I am off... as it were <grin>.

G'Night............... jt

Alex Carver wrote:
You're looking to solve the centroid problem.  Your locations describe a 
polygon and you want the centroid of that.

A few Google searches on calculating centroids should lead you the right way.

--- On Mon, 1/18/10, Jim Tolbert <[email protected]> wrote:

From: Jim Tolbert <[email protected]>
Subject: [Xastir] Off Topic: Method to deterrmine location of N minimum points 
from a dataset
To: "XASTIR" <[email protected]>
Date: Monday, January 18, 2010, 8:05 PM
Sorry for the off topic, but I am not
sure where to start and I figured some of you folks probably
know..  Any suggestions on what I should search on?

I want a method to calculate the locations of N points from
a dataset of locations that has a minimum cumulative
distance.  That, what are the locations of a given
number of Basepoints so that the distance from the dataset
to one of he basepoints is
minimized.   Specifically, if I have a set of
all the locations in a service area and I want to know where
to place service providers in the dataset, were should I put
them if I have two service providers, where should I put
them if I have three providers, etc.

I am sure I did this as a home work problem long ago in a
computer programming class, but I can't seem to come up with
a simple means of doing it.   I am betting
the method is detailed out there somewhere, but I can't find
the correct search parameters.

Please send any suggestions to me at

jim at RiverRidge-WI dot net

Thanks all................ jt
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