That is why the earliest incarnation of the ley thinking didn't make much sense either .It was map based , people don't do straight lines in the real world unless it is on a bowling green or sports ground .
Too many interesting things to see , awkward things to avoid or simply keeping to the contours .
The same type of problem is inherent in the equidistant type stuff they measure the distance from A-B on a map and forget about how long it might actually take to traverse the distance i.e. two 4000 feet high hills might only be a mile apart but if you have to descend 3500 to get to the other it's not really a mile in the real world . The same applies to low heights where the ground is not uniformly flat .
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