For the millions of GPS owners who love their GPS units but don't know all they can do with them, this fun guide shows that a GPS can do a lot more than just ca

For about $150 anyone can access the United States' multi-billion dollar GPS program. Using GPS Outdoors: A Practical Guide for Hikers, Bikers, Paddlers, and Cl

A comprehensive guide to mapping software explains how to interface one's GPS receiver with a computer to create maps, annotate aerial photos, and create 3-D ma

Learn basic and advanced techniques for using GPS to enhance your favorite outdoor activities, from hiking to fishing. Hikers, backpackers, mountain bikers, ang