# Tweet by [@keefmoon](http://twitter.com/keefmoon) on 2012-09-21 12:40:09 > [!INFO] Archived from [original tweet](http://twitter.com/keefmoon/status/249125865580011521) As the iOS6 Map stuff shows, sourcing and rationalising geo-data is HARD, and there is no substitute for casting a human eye over it.