This CD features digital topo maps for the US that are comparable to the US Geological Survey's 1:100,000 scale paper maps. Detail includes terrain contours, elevation, information, some roads, trails, summits and some bathymetric contours. Details Operating system Windows 95, 98, 2000, NT & XP Processor Pentium processor or higher Memory 16 MB Hard disk space 20 MB Video 256 colors, 24 bit recommended Mouse Mouse or other pointing device required Other Requires PC interface cable for data transfer Full Description Plan your next outdoor adventure with the help of MapSource United States TOPO CD-ROM. This CD contains digital topographic maps for the U.S., including Alaska and Hawaii that are comparable to the U.S. Geological Survey 1:100,000-scale paper maps. Features include: Trip and waypoint management functions Highways, roads, hiking trails, snowmobile trails, backwoods trails, elevation contours, point elevations, summits, some bathymetric contours, geographic names, churches, and schools Shoreline detail for lakes, reservoirs, small bodies of water, waterways, rivers, and streams Icons representing boat ramps, dams, marinas, campgrounds, public facilities, mile markers, first-aid stations, picnic, swimming, and ski areas, wrecks, fuel, and dangerous and restricted areas Nautical navaids for the 50 states including radiobeacons, RACONs, and fog signals; river, harbor, and other lights; and daybeacons and lighted and unlighted buoys Wrecks and obstructions—such as shipwrecks, submerged rocks, obstructions, and other hazards to nautical navigation Compatible with the Following GPS units: ETREX LEGEND, VISTA, GPSMAP 60C/S, GPSMAP 76S, GPS V, RINO 120, RINO 130, STREET PILOT III & 2610: Transfers waypoints, routes and tracks. Maps download to memory capacity. Real time tracking. IQUE 3600: Transfers waypoints. Maps download to memory card capacity. OTHER GARMIN GPS: Transfers waypoints, routes and tracks. Real time tracking.