National Geographic TOPO! Weekend Explorer 3D (San Francisco Bay Area, Big Sur, Napa Valley) Interactive, GPS-ready software helps you plan the ultimate weekend outdoor adventure in the San Francisco Bay area, Big Sur, and the Napa Valley Provides accurate, dependable information that will enhance your trip or excursion, including a true sense of the terrain before you head out Generate and print high-quality maps; include elevation profiles, select latitude/longitude or UTM grids Elevation profiling option lets you visualize elevation gain; intuitive navigation tools make it easy to see hidden valleys, or stand on top of a mountain and get a bird's eye view "Maps by Mail" feature lets you order large, high-resolution prints of your maps, and get them delivered to your door; search function locates trails, camps, and campgrounds, lakes and more