What your seeing is the global map that comes with Basecamp. Connect the Nuvi to your computer via a usb cable, then restart BC. BC will load the maps that are on the Nuvi. Then select the map you wish to use from the map menu and plan your trip using it. Make sure the detail is set to 'Highest'.
I do believe that the Nuvi 500 includes preloaded U.S. topographic maps plus City Navigator® NT data for the lower 48 states, Hawaii and Puerto Rico, but no Alaska or Canada detail.
dlh62c screwed with this post 07-26-2012 at 04:08 AM