Link Safe

There is a marvellous free app called ViewRanger that will do exactly what you want you'll find it in the Play store, at  https://play.google.com/store/app  The free version relies on a variety of 'open maps: Though many people contribute to and use these community-built charts, their quality and accuracy obviously cannot be guaranteed. Read more about open maps at http://www.viewranger.com/web-maps.  Alternatively. ViewRanger will allow you to buy maps from a variety of trusted sources including Ordnance Survey, Great Britain's national mapping organisation. In all cases, it is possible to save maps for offline use so you can navigate footpaths even without a 3G broadband or Wi-Fi connection. While Google owns the data for some of its map data, other areas are licensed from other companies. While the error message displayed by the Nexus 7 isn't explicit on this point, the restriction is almost certainly the result of licensing issues.