Maps can be categorized into two categories, satellite maps, and topographical maps. You should consider both types. Each has its advantages. However, the topographical map is the one you want to use. On a topographical map, you can see ridges and contours of the land. Using these contour lines, you can estimate where bucks will possibly bed. Again, look for places with ample cover. A buck needs to smell what's behind it and see what's in front of it.