On Wed, Mar 11, 2015 at 9:24 AM Markus Krötzsch < markus@semantic-mediawiki.org> wrote:
No, you are right: this is of course an issue in the completeness of our data. If you zoom in to Europe, you can see that some countries have costs full of lighthouses, while others seem to lack them almost completely. I think it clearly shows that a lot of our data comes from Wikipedias (in some specific language).
In this instance, the issue appears to be that the existing lists on
Wikipedia have not been touched, e.g.: https://en.wikipedia.org/wiki/List_of_lighthouses_in_Spain
These, including redlinks, could be imported into Wikidata rather easily. Some already have images.
Ideally, we'd want some "official" (e.g. national, UN) source to cross-check.