I saw that when when it was announced on HN. However downloading a map "for a 10-mile radius" is not useful when you don't know what 10-mile radius you might ne

I saw that when when it was announced on HN. However downloading a map "for a 10-mile radius" is not useful when you don't know what 10-mile radius you might need ahead of time. Compare with Nokia maps where I can download a map of New Hampshire and Vermont ahead of time and know that when I'm unexpectedly out of cell coverage, I'll still be able to route (or re-route) with my phone GPS. This is an area where GMaps is still playing catchup.