Every month, over 200,000 GPS units are sold to recreational users in the U.S. Learning to use a GPS is fairly straightforward; choosing which software to use is not. GPS Mapping – Make Your Own Maps guides readers through the challenging choices they face and shows them how to combine the fun of high-tech with the security of paper maps. Covering all major brands of mapping software, it also explores sources of free software and maps, how to use aerial photos and satellite imagery, and how to view backcountry locations in 3-D. GPS Mapping reduces a reader’s learning curve and gets them mapping right away.