Nicholas(夏远峰) wrote:
>     How can I get region code from the Google map api......I want to know 
> region code..But I can only get country code...

The data that's provided is what you get. It depends on what Google
have available. In the United States, for example, the
<AdministrativeAreaName> gives the two-letter state code.

http://maps.google.com/maps/geo?q=memphis,us&output=xml&sensor=false&key=abcdefg

In the UK, AdministrativeAreaName is the county [most of the time]:

http://maps.google.com/maps/geo?q=lewes,uk&output=xml&sensor=false&key=abcdefg

Geonames have a webservice which you could make use of, once you know
the coordinates of the point of interest. The name of the region is
returned as AdminName1:

http://ws.geonames.org/countrySubdivision?lng=114.3979471&lat=39.9081726
http://ws.geonames.org/countrySubdivision?lng=0&lat=49.9081726

That web service doesn't return English counties though:

http://ws.geonames.org/countrySubdivision?lng=0&lat=51.9081726

Andrew
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