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Re: length of a 40


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Posted by MarkB_MI on October 11, 2014 at 01:24:15 from (70.194.8.242):

In Reply to: Re: length of a 40 posted by wisbaker on October 10, 2014 at 18:12:09:

I don't doubt that some of the northern townships are missing sections, but that wouldn't be because of a 900 foot error on the baseline (which we call Eight Mile Road around here). It would be because it's about 500 miles from the southern Michigan border to the northernmost point of the UP.

The further north you go, the more rapidly the lines of longitude converge. At the equator, a section will be almost perfectly square. But at the north pole, your "section" will be pie-shaped and will be much smaller than 640 acres. At the north pole, you will only get 6.28 pie-shaped parcels one mile wide at the base and one mile tall. Each of these "sections" will be half a square mile. The UP and the northern lower penininsula are north of the 45th parallel, halfway between the equator and north pole. Although convergence of the lines of longitude is not as pronounced here as at the poles, it is still significant. The townships will be increasingly trapezoidal as you go north, so it's going to be difficult to get 36 evenly-sized sections out of a northern township.


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