Adding a Geolocation column to a list in SharePoint 2013 is a bit of a pain because there’s no built-in user interface to do so. Instead, you have to add it with code. Check out Tobias Zimmergren’s article to get acquainted with the Geolocation column in SharePoint 2013: http://zimmergren.net/technical/sp-2013-getting-started-with-the-new-geolocation-field-in-sharepoint-2013.
Now, to the point of my post, I’ve just launched a project on CodePlex to provide a UI for Geolocation management in SharePoint 2013. Ideally this will work in both on-premises and online environments.
As this is a new effort, it’s currently in beta and needs a lot of work to be truly awesome. That said, check out the project here: http://sp2013geolocationmanager.codeplex.com/. I appreciate any and all feedback. You can reach me at firstname.lastname@example.org or email@example.com.