Cavern in Feet

[John B. Halleck]

[Lev Biship makes a long winded argument that the difference between the types of feet makes no difference in practice.]
 
I believe you missed the point Mr. Bishop.
Nobody is claiming that the type of feet make any practical difference in the cave.
 
HOWEVER, not everybody gets to do their own thing with an isolated survey that nobody cares about.
Some people have to deal with agencies and their legally mandated requirments of throwing significant resources onto their local State Plane Coordinates, and matching their local control points.  And for those which feet are used can make a difference.
 
For example, the Colorado North State Plane Coordinate system has an origin OVER TWO MILLION  FEET west of a lot of the region covered in the zone.  In 2,000,000 feet the difference between the feet add up...  and the difference is large enough to be measured by even a drug store tape measure.
Maybe you were going for humor with your comments, but the difference between 2,000,000 "International" feet and 2,000,000 Survey feet doesn't need in invar tape to detect.
 
It seems to me if someone wants to play by the technical legal rules, they should be allowed to without people arguing against it.
 
 
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