DL http://geocoder.us is a service that translates street addresses to longitude and latitude. Such coords are a necessity for some services such as Google's map API.

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Professional Approach

(to come)

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Simple Approach

Here is the simplest solution with no error checking and no extensive use of packages. (A more professional version - to come - would use an XML package and provide error checking and a million options.

Note - this is ONLY to be used by non-profit purposes. See the http://geocoder.us web page for commercial or for-profit uses.

 # comment out next line to read from command line
 set argv "100 Bureau Dr, Gaithersburg, MD  20899"
 regsub -all " " $argv "+" encodedURL

 set geocoder "http://rpc.geocoder.us/service/rest/geocode?address=$encodedURL"
 set data [http::data [http::geturl $geocoder]]

 regexp "<geo:long>(.*)</geo:long>" $data X long
 regexp "<geo:lat>(.*)</geo:lat>"   $data X lat

 puts "long: $long"
 puts "lat : $lat"

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