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Old April 3rd 10, 11:25 PM posted to rec.aviation.soaring
Tuno
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Posts: 640
Default US-Canada airspace/border files available

My pleasure Dave

A note to anyone interested in these (justsoar.com) border/airspace
files: there are other airspace/border files available for the US
borders, and have been for a long time. The difference twixt these and
those is these are not an open sequence of points. SeeYou (not sure
about other apps but I suspect they're the same) will attempt to close
the open sequence if you add one of those as an airspace, which
results in an incorrect rendering of the "border". "These" files fix
the problem by adding fictional points on the no-fly side of the
boundary, creating a moat of sorts. This makes them useful for US
pilots, and useless for pilots trying to stay out of the US.

Choose the files that solve your particular problem, be they those or
these.

2NO