There are multiple vocabularies for encoding geo position information, but due to the strong support by major search engines, we recommend using the http://schema.org properties
@prefix s: <http://schema.org/>
foo:pos a gr:Location;
gr:name "Hepp's Bagel Restaurant Munich - Bagel Street";
s:address [ a s:PostalAddress;
s:streetAddress "Bagel Street 1234";
s:postalCode "12345";
s:addressLocality "Munich, Germany" ];
s:latitude 45.75;
s:longitude 49.98;
s:telephone "+49-89-12345678-0".
TBD: global URIs of schema.org properties!