GeoNames is launching a Premium Data Subscription as a quality offering for professional users. The Premium Data is released monthly on an annual subscription basis. The first release ‘September 2010’ is now available.
Two approaches are used to find and eliminate errors and inconsistencies. On the one hand all modifications are monitored and sorted by relevance. All relevant modifications are verified and confirmed by a member of the GeoNames team, on the other hand over a hundred consistency checks have been implemented to spot quality problems.
The Premium Data also includes release notes, documentation and additional data files. It is available in csv and rdf format.