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User Name | Thread Name | Subject | Posted |
Jack Campin | BS: Any surveyors here? shoelace formula? (15) | RE: BS: Any surveyors here? shoelace formula? | 26 Feb 21 |
The mathematics is the interesting thing here, but there is a neat photo in the Te Papa museum in Wellington that shows how the basic data might be an issue. It's of a fence, with a sharp step in its line. They needed to insert about three metres of new fence when an earthquake shifted half the farm sideways along a faultline. So where is the boundary defined? The farmers decided to follow pegs in the ground, but earth coordinates would say different. |