Re: [PHPLIB] [OT] Finding nearby locations From: Gary Bickford (garyb <email protected>)
Date: 04/12/00

Hi. This is the qmail-send program at va.php.net.
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This is a permanent error; I've given up. Sorry it didn't work out.

<php3 <email protected>>:
Re: [PHPLIB] [OT] Finding nearby locationsAack, child crashed. (#4.3.0)
I'm not going to try again; this message has been in the queue too long.

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I'm resending this as it just got bounced by qmail.

You can get the info from the TIGER dataset used by www.census.gov.
It's the
basis of most of the mapping engines out there (each commercial vendor
in
theory has their own corrections) The TIGER data is free, but it's a
little
hard to actually find an up-to-date dataset. It's got not only the zip
codes,
but all the street address->LAT/LONG mappings. The data takes up about
6GB if
you want all the streets etc.

Hmm. I have a friend who writes mapping applications, who knows about
this.
And, it turns out, he has links to the data you need. The Zipcode data
is only
about 1 MB. I also recommend him as a source for any online mapping
application or integration into your website. He did an excellent job in
Perl
& Javascript for my former employer at a very reasonable cost. He also
did the
Census Bureau's web mapping system - it's driven by (as I recall) six
SGI high-end servers. Building GIFs on the fly in high volume can burn
a lot
of cycles!

Silicon Mapping Solutions is at http://imap.chesapeake.net.

NB: I believe the zipcode data he has online is from the 1990 census
data. The
USPS updates every year.

Gary B

Francisco Hernandez wrote:

> James Thompson wrote:
>
> > Hello,
> >
> > I'm currently working on a site using PHP/PHPLIB. The owner of the
> > company the site will belong to wants to put up a page where customers
> > could put in their city,state to get a list of possible shops in their
> > area they can go to for service. It'd need to include all cities within
> > a customer supplied radius (say 10, 25, or 50 miles).
> >
> > I'm thinking that such a system could be built on a longitude and latitude
> > based system but I was wondering if such a system already exists in php or
> > phplib and I've overlooked it.
> >
> > Thanks
> > James
> >
> > ->->->->->->->->->->->->->->->->->->---<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<
> > James Thompson 138 Cardwell Hall Manhattan, Ks 66506 785-532-0561
> > Kansas State University Department of Mathematics
> > ->->->->->->->->->->->->->->->->->->---<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<
> >
> > -
> > PHP3 Base Library Mailing List. Send messages to <phplib <email protected>>.
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>
> i recently asked that question in a web message board..
> http://www.phpbuilder.com/forum/read.php3?num=1&id=16190&loc=0&thread=16190
> i got 2 responses someone posted code to figure out the distance
> differences.. but i still need to find the zipcode latitude longitude info..
> usps.gov has it.. somewhere.. :)
> tell me if you find it, ive been unsuccesfull..
> and theres also zipinfo.com..
>
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