NYCPHP Meetup

[Adam Maccabee Trachtenberg]

On Fri, 21 Nov 2003, Mark Armendariz wrote:

> here's a function i've ben using for a couple years now.  I can honestly say
> I have no idea whether or not i wrote it as i'd done a LOT of variations of
> it at the time.  From what I know it's worked well for around 2 years now
> (for my client).  I've only tested with US values, but i imagine it should
> work for other values as well.

I believe this (and all other variations, including an article in
php|architect) comes from piece of code written by Dave Sklar.

http://px.sklar.com/code.html?id=88

As far as I know, he was the first person to come up with the idea of
leveraging the US census ZIP Code data in combination with this
algorithm. Of course, Dave did not invent the "great circle"
algorithm, so the credit only goes so far. :)

-adam

-- 
adam at trachtenberg.com
author of o'reilly's php cookbook
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