The ideal software for planning your U.S. National Park adventures Explorer 3D combines the precision and accuracy of our printed Trails Illustrated topographic maps with the award-winning TOPO custom mapping technology. The easy-to-use interface helps you quickly locate trails create instant elevation profiles plan routes and print your own custom maps with trail trailhead campsite hiking safety and trip-planning information. GPS compatible waypoints and routes sync with your GPS unit. Maps can be exported and viewed on the Magellan Triton series of handhelds. PC-Mac compatible. System Requirements Windows 95 98 NT ME 2000 XP or Vista.