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Backpacker magazine's Using a GPS: Digital Trip Planning, Recording, and Sharing is a soup-to-nuts guide to digital mapping. This pocket-sized guide by Bruce Grubbs walks you through planning and recording your trip as well as sharing it with the world.

  • Content includes basic GPS theory, instructions, field techniques, computer-based mapping with GPS
  • Incorporates color photos, charts, and illustrations
  • Reviews
  • Q & A

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