On Thu, 28 May 2009 08:26:08 PDT, Benjamin April said: >> "US government officials are concerned that the quality of the Global >> Positioning System (GPS) could begin to deteriorate as early as next year, >> resulting in regular blackouts and failures â or even dishing out >> inaccurate directions to millions of people worldwide.
> I call FUD. A sensible GPS should cease to give directions if the > current EPE (Estimated Position Error) exceeds a reasonable value. > Based on the position of the satellites detected and their relation > to the receiver it can calculate an approximate accuracy. > Lack of satellites could cause outages, it won't direct you to > Seattle when you are headed for Boston. Your GPS thinks you're heading north into Blacksburg from I-81 on the 460 Bypass highway. You need to take an off ramp on the right hand side, then bear right to get onto Transportation Research Drive, then a left onto Industrial Park Road to eventually get to my office. Unfortunately, if you were actually heading north on *Business* 460 a few hundred yards west, taking the right-handed off ramp at the same relative location, then bearing right, will land you on a ramp pointing you *back* south to I-81, and you won't have a chance to turn around for about 2 miles. http://maps.google.com/?ie=UTF8&ll=37.191194,-80.402327&spn=0.013829,0.022767&z=16
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