garmin maps ?

Just thought id chime in. I just posted a similar topic last week and had limited help.I had to learn alot by trial and error. If your looking for a "google earth" style map, order the birdseye. Then go down to radio shack or walmart and by a micro sd card. I bought a 32 gig and you can get alot of country on it. Birdseye is a little confusing till you get the hang of it, but is surely the way to go. I got most of central texas in standard definition, and alot of the current places i hunt in high definition. And still have plenty of space. High def is awsome, i could see a tire laying in the bed of a parked ranch truck. High def takes forever to download. Topo maps are just lines on your map, I recommend going with the birdseye. Idk if the 220 is sd compatable but do know the 320 is, the card pops in right behind your battery. Hope this helps!