In UMDM, we use covPlace to indicate the geographical location associated with the production of the content of a resource (not the geographical subject). (though I posit that this has not been consistently applied...)
Anywho...
<covPlace>
<geogName type="continent">North America</geogName>
<geogName type="country">United States of America</geogName>
<geogName type="region">Maryland</geogName>
<geogName type="settlement">College Park</geogName>
</covPlace>
to
dc:coverage <http://id.loc.gov/authorities/names/n79055717>
I am also thinking about geonames for uris instead.
UMDM's covPlace lists out continent, country, region, settlement, etc., but I sort of feel that the use of a URI negates the need to explicitly list this, particularly if we can make use of GeoNames since it includes parentCountry.