Tape Measure Rant


Rex Edgar

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conversion errors? both the international foot (25.4mm=1in exactly) and the US survey foot (1ft=1200/3937m exactly) are defined with precise conversions. I don't know if the ellipsoid datum is involved in surveying, but even back in 1927, the North American NAD27 datum was defined in metres and not feet. So why should there be conversion errors?

I currently am in a country where surface land coordinates, and topographic elevations are measured in metres, but sub-surface depths and coordinates are measured in feet because US drilling contractors are often used - that's the kind of system that causes conversion errors!

Thanks for the video, H3nry!

'Tis a rather complicated construction, though...

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