There's no excuse for this, because the 'big picture' is available at your fingertips by zooming out on your GPS, until you see as much as needed to be able to see it all.   
  It's almost like having GoogleEarth in your hands (well, not quite!), except that the screen is small.
  If size is your issue, just buy a bigger screen version of your favorite brand, but be ready to fork over some extra cash for the privelege.
  I get by just fine with mine.

Mike B.
  Maps and GPS are complementary.
  With just the GPS one becomes myopic. I know people who drive by GPS, get where they need to, but have no idea of the "lay of the land". They simply become slaves of the directions of the device, and should need arise they cannot navigate on their own because they lack the big picture.