Wow.  Not meant to diminish the fine info and updates from our esteemed members, but this GPS neophyte was getting ready to take a bunch more tylenol trying to decipher things.    

Azalea, that's about the best summary instruction I've read yet.  You've provided a basic layman's guide to the different aspects of the GPS and mapping and how these things interact.  Thx!   [smiley=thumbup.gif]

Someday soon, I'll have to buy a decent GPS and make time in my busy schedule to learn the ropes.