Читать книгу Day & Section Hikes Pacific Crest Trail: Northern California онлайн

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Topographic maps show latitude and longitude data as well as UTM grid lines. Known as UTM coordinates, the numbers index a specific point using a grid method. The survey datum used to arrive at the coordinates in this book is WGS84 (versus NAD27 or WGS83). For readers who own a GPS unit, whether handheld or onboard a vehicle, the latitude–longitude or UTM coordinates provided on the first page of each hike may be entered into the GPS unit. Just make sure your GPS unit is set to navigate using WGS84 datum. Now you can navigate directly to the trailhead.

Most trailheads, which begin in parking areas, can be reached by car, but some hikes still require a short walk to reach the trailhead from a parking area. In those cases, a handheld unit is necessary to continue the GPS navigation process. That said, however, readers can easily access all trailheads in this book by using the directions given, the overview map, and the trail map, which shows at least one major road leading into the area. But for those who enjoy using the latest GPS technology to navigate, the necessary data has been provided. A brief explanation of the UTM coordinates from Warner Valley Road to Terminal Geyser follows: