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 Tony Di Croce wrote: > 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 (geographically) another > person. > > 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? > > Hopefully someone responds to this with a Pear package that does exactly > what I need! :) If that can't happen, then I'd appreciate any options you > can think of. > > td > > -- > Free Linux Technical Articles > http://www.linuxtecharticles.com > -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
