SPUG: Geocoding System

M. Alway always at u.washington.edu
Wed Mar 24 12:28:34 CST 2004

I've also been very interested in converting addresses to lat/lon.  What
I've done so far is harvest this information off of
www.terraserver.com/search/address_search.asp by using LWP to form a post
with the same field information and then the resulting page has the lat
and lon in the link labeled "view".  You can extract the coordinates with
regex or using an HTML parser module.  There's several other sites that
allow this type of searching also.

Like any valuable FREE resource, use in moderation (e.g. a few hits a day)
versus slamming them while you attempt to find lat/lon for every entry in
a 2000 person database.

-- Mark

= Mark Alway                                       =
= Lead Software Developer                          =
= Ed-Tech Development Group                        =
= Educational Partnerships & Learning Technologies =
= University of Washington                         =
= Box 353080, Seattle, WA 98195                    =
= 206.616.3406                                     =
= always at u.washington.edu                          =

On Tue, 23 Mar 2004, Brian Hatch wrote:

> > >[...]I need to feed it addresses and get back long/lat values.
> I don't have a pointer for that, but you can get zip to lat/long
> values via the usps.gov website somewhere, or at least I know I
> did two years ago.  Not useful for intra-city tests, but good enough
> if you're trying to find who has traveled the furthest for homecoming...
> --
> Brian Hatch                  Reading whilst sunbathing
>    Systems and                makes you well-red.
>    Security Engineer
> http://www.ifokr.org/bri/
> Every message PGP signed

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