Yes, the ones that I have seen use longitude and latitude for zipcodes. Lots of places you can purchase those tables.
> -----Original Message----- > From: Alan Wolfe [mailto:[EMAIL PROTECTED] > Sent: Thursday, July 28, 2005 6:59 PM > To: [email protected] > Subject: Witango-Talk: Location based services > > Hey guys, > > I was wondering, how do those sites work where it lets you > search for lets say a business of a certain type that is x > miles away from zipcode xxxxx where it lets you put in a > distance and zipcode? > > I cant think of how to even begin on that one, do they store > longitude and latitude in a database or something? > > Any ideas? > > Thanks! > Alan > ______________________________________________________________ > __________ > TO UNSUBSCRIBE: Go to http://www.witango.com/developer/maillist.taf > ________________________________________________________________________ TO UNSUBSCRIBE: Go to http://www.witango.com/developer/maillist.taf
