From tbscott@umich.edu Tue May  4 05:54:11 1999
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Date: Tue, 4 May 1999 08:54:07 -0400 (EDT)
From: Tiffany B Scott <tbscott@umich.edu>
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To: waphgis@u.washington.edu
Subject: Re: Hospitals catchment area
In-Reply-To: <C1256767.003989EA.00@enterprise.asl.bergamo.it>
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Alberto,
What software (and geocoder) will you be using.  Or are you looking for
suggestions as to the best tools for the job?

On Tue, 4 May 1999, Alberto Zucchi wrote:

> Dear Listers, I'd like to receive some suggestion on the following problem.
> I have a data-set containing all paediatric admissions (say, 200,000) in
> all the hospitals in a region (say, 30).
> I have two tables. The first contains hospitals' localization (with related
> coordinates). The second contains each admissions these hospitals did in
> one year, with each patient's city of residence (say approx. 200,000
> patients for 2,000 cities/villages). I'd like to create a "catchment area"
> for each hospital, in relation to their patients' residence. I thought to
> build a "distance matrix" in kilometres, and the calculate the mean or
> median distance for each city/hospital, and finally superimpose a "buffer"
> (or maybe drawing a simple circle...to simplify reality). Does anyone have
> some suggestion/trick on the way to perform this?
> 
> Thank you in advance.
> 
> Alberto Zucchi, MD
> Epidemiology Office
> ASL Bergamo
> 
> 

.