TR: Geonames enters the Semantic Web
The NAR has defined locations as a valuable entity for tagging news.
Locations can be the subject of news, as in:
Or used a location from which the content originates, as in:
Geopolitical areas can be associated with a gps position,
<position longitude="" latitude="" altitude="" />
The question is: where to find a great thesaurus of world locations with
associated gps positions?
Geonames seems to be a great resource.
Note: The editing being wiki-like, it is fairly precise, but I would advise
to be careful before going in production: what is Madrid's position changes
for 2 hours before correction?
Thanks to Raphaël Troncy, from CWI in Amsterdam, for the tip.
Laurent Le Meur
I'm very pleased to announce that, through a quick and efficient
collaboration with Marc (in cc), the 6 million and growing geographical
features in the data base of Geonames  are now described by a OWL
ontology , and the RDF description of each instance, including names,
type, of course geolocation elements, is now available through Geonames
Webservice, adding to an already impressive pack of services .
The ontology is very simple, and leverage elements of the wgs84_pos
vocabulary . The feature types are described using a simple SKOS
vocabulary, which has been embedded in the OWL ontology.
If you add that, thanks to Google Maps API, the geonames features can be
created and edited through a wiki-like interface , this as Web 2.0 as
Comments welcome, either here or in the Geonames forum 
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