Where do Google and Twitter source political boundaries of cities, regions and states? <p>I have recently noticed the nice dashes that Google Places puts around cities, regions, states etc. I've been hunting around in the <a href="https://developers.google.com/maps/documentation/javascript/reference?hl=fr-FR#PlacesService" rel="nofollow">Google Maps API</a> and the <a href="https://developers.google.com/maps/documentation/javascript/places" rel="nofollow">Google Places API</a> trying to find out how to access the information thus displayed, without success. </p> <p>I've discovered that <a href="https://dev.twitter.com/docs/api/1.1/get/geo/id/%3aplace_id" rel="nofollow">Twitter has a nice API</a> for this and I would be tempted to use that instead of Google's, but I worry that the lines that Google draw and the lines that Twitter draw may not correspond. </p> <p>Is it safe to assume that both companies are using the same data? If not, where do I find the appropriate API information for the Google implementation?</p> <p>Alternatively, where do I find the geodata they're both using?</p> <p><strong>PLEASE NOTE</strong> I'm asking about this in the context of Australian geodata. Do Google and Twitter use the same or different resources?</p>