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,
> > 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?
There is a class called zipLocator. I think I found it at
phpclasses.org. It uses a
>
> I'm helping a friend of mine build a matchmaking website, and
> we have a
> doozy of a problem to solve:
>
> What I need to do is two fold:
>
> #1 Collect whatever geographical information I need from each
> user to enable
> #2
> #2 Be able to run query's to find people NEAR (geographicall
Hi Tony,
I would think the first step would be to find a web service or dataset
to convert a zip code to longitude/latitude.
The formula for calculating distances from long/lat is available here:
http://www.colorado.edu/geography/gcraft/warmup/aquifer/html/distance.html
Cheers,
David Grant
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