Hi James,

In general, we are very cautious with geocoding editors and particularly at a more granular level than the country level and even more cautious when this data will be published. From a technical point of view, you could already do it for anonymous editors as their ip addresses are published on the Wiki itself and in the XML dump files. For logged-in editors we would have to rely on the RecentChanges table (see http://www.mediawiki.org/wiki/Manual:Recentchanges_table). However, data in this table is only accessible for users with the checkuser permission (http://meta.wikimedia.org/wiki/CheckUser_policy#CheckUser_status). Hence, we cannot use this source to geocode editors. Even if the data was available from a source without such restrictions, then we would still have restrictions from the WMF Privacy Policy and community expectations regarding the geocoding of ip addresses. 

I am afraid that we have to reject this request based on the fact that we do not collect this data in a publicly available table and that geocoding publishing geocoded editor information would violate the Privacy Policy of the WMF and not match with community expectations regarding the geocoding of ip addresses. 

Maybe we can continue this discussion to see if we can come up with alternative solutions to your problem?

Best,

Diederik