[Talk-us] How accurate is Tiger data vs Yahoo Aerial?

[Russ Nelson]

am12 at bolis.com writes:
 > I'm sure the correct fix is some real GPS readings, and align both the
 > photos and tiger tracks to them.  But I don't have a GPS so I'm just
 > working off the Yahoo photos.
 > 
 > Any advice or suggestions?  Thanks.

Get a GPS?  You have two opinions about reality, and you need a
third.  A GPS receiver will be ready at hand to give you another vote
to break the deadlock.

You can also consult Acme Mapper at http://mapper.acme.com.  The Topo
and DOQ layers are in the public domain.  Some Satellite layers are
produced by government entities and may be free of copyright.

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