Data Hacking

Chapter 8 — GPS Data
you create a new waypoint, you can enter any information relating to this waypoint. Of
course, the most important information are the coordinates (latitude and longitude), which
you can read off of a map. Chances are good, however, that you won’t be able to get a set
of coordinates that are as accurate as those that you could get from being at the actual
location, but it should be enough to get you there, especially if you choose an obvious
landmark (visit www.maptools.com for transparent overlays for paper maps that make
getting an accurate coordinate possible). With digital maps, the coordinates of the location
at the cursor are normally given to a high degree of accuracy. If you choose a good landmark
that’s easily visible, then the actual coordinates can be off by several hundred feet
and not make a difference because once you are in the vicinity you can navigate by sight.
FIGURE 8-29: Changing waypoint information is easy, but take care in case
you accidentally change information such as the coordinates of the waypoint!
FIGURE 8-30: Creating a new waypoint
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