DBpedia is a project aiming to extract structured content from the information created as part of the Wikipedia project. Wikipedia articles consist mostly of free text, but also include structured information embedded in the articles, such as “infobox” tables, categorisation information, images, geo-coordinates and links to external Web pages. This structured information is extracted and put in a uniform dataset which can be queried.
DBpedia also provides its datasets in a downloadable format. One of the most relevant downloads for our project is geographic coordinates: see here.