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Re: John Michell lecture
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cerrig wrote:
Depending on the circumstances, I may use a watch, a compass, a clinometer, or a theodolite.

I would never suggest using it as a very accurate measure but the eye can be accurate to within a degree with a bit of experience .
For the same reason I would never consider a watch or compass for an accurate alt .All can provide something that will suffice , (I can think of theodolite surveys that would have done better from a photograph ), but it's best that we can be as accurate as possible .
Using a theodolite can produce accurate reasults but so much depends on the user , never mind the problems associated with weather .
Very often the same user at the same site comes up with differing results not to mention whopping errors .
How do you think Michell came up with his bearing for May day from men an tol ?

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Posted by tiompan
10th May 2016ce

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Re: John Michell lecture (cerrig)

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