On 21 Nov 2005, at 14:14, Tony Di Croce wrote:
Does anyone know of any commercial or free implementations of this?
Is it
primarily a database problem or is their some way (computationally) to
compute the probable proximity of two zip codes?
All the suggested packages could be all you need, but also note that
MySQL 5 has built-in GIS features which may make searches like these
way more efficient should they use them:
http://dev.mysql.com/doc/refman/5.0/en/spatial-extensions-in-mysql.html
http://dev.mysql.com/doc/refman/5.0/en/functions-that-test-spatial-
relationships-between-geometries.html
Marcus
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Marcus Bointon
Synchromedia Limited: Putting you in the picture
[EMAIL PROTECTED] | http://www.synchromedia.co.uk
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