[aprssig] Winaprs and Precision Mapping

[KC2MMI (Jared)]

Chris, just bear in mind that the TIGER maps are specifically designed for
demographic use only--not for navigation. And you may find local errors of as
much as 1/10th of a mile because of legacy issues involving datums. The USCensus
is aware of these issues but lacks the funding to correct them, although they do
release a number of corrections every year for different counties.