Tim,
I asked this question a while back. Here's what I learned:
"The foot originally adopted in the U.S. was based on 39.37 inches being
equal exactly to 1 meter, and thus 1 foot equal to 0.3048006 m. In 1959,
however, the US officially adopted the inch as equal to exactly 2.54 cm, so
under this standard 1 ft equals 0.3048000 m. This difference amounts to one
part in 500,000 or 1 ft in 99.6969... miles. Since all surveying done prior
to 1959 was done on the original standard, it would have been confusing to
change. Therefore the original basis, now called the US Survey Foot, has
been officially adopted for surveying."
Then International Foot is the 1959 standard.
Phil Uhl
Salt Lake City
-----Original Message-----
From: Tim Warman [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, September 01, 1999 4:08 PM
To: Mapinfo-L (E-mail)
Subject: MI strange behaviour with imported shape files - I think I
figured out the problem
Okay, ignore the first question, the shape files appear to have been in the
State Plane Coordinate System (survey feet) and I imported them as UTM.
Another question that comes up though is: are survey feet the same as
regular feet?
Someone once told me that the US and Libya are the only two countries yet
to adopt the metric system.
Someone also told me that Americans don't understand irony.
Cheers,
Tim
________________________________________
Tim Warman
Geologist & GIS Specialist
Richard C. Slade & Associates, Consulting Groundwater Geologists
North Hollywood, CA 91606
(818) 506-0418
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