"Map-based navigation: it's one of the killer apps for any
mobile platform. The only sticking point is getting the maps.
Downloading map tiles on the fly is the default solution for most
navigation apps, but pre-loading makes more sense when it's
possible. Unfortunately, open source navigation apps have earned a
reputation for clunky and awkward map-loading interfaces.
"This weekend, let's look at a simpler method, so you can get on
the road quicker."