In the middle of the competition of GPS in the world of technology, there are a lot of things in which they are used in order to make the GPS are really great and it has a lot of people who choose to get them. This kind of device is really made in the very smart way in which it gives the best things that you can use for all kinds of activities. For example, the map page is where all of the action happens on this GPS. You can choose if you want to view Aerial Photography, USGS Topo maps, DeLorme Topo maps, or Satellite imagery. There is also a base map which displays major roads of the entire world. » Read more: Delorme Earthmate GPS PN-20