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2. Triangulation (surveying) - Wikipedia

   en.wikipedia.org/wiki/Triangulation_(surveying)

   Snell underestimated the distance by 3.5%. The two towns were separated by one degree on the meridian, so from his measurement he was able to calculate a value for the circumference of the earth – a feat celebrated in the title of his book Eratosthenes Batavus (The Dutch Eratosthenes), published in 1617. Snell calculated how the planar ...

3. Surveying - Wikipedia

   en.wikipedia.org/wiki/Surveying

   Dominion Land Survey, the method used to divide most of Western Canada into one-square-mile sections for agricultural and other purposes; Public Land Survey System, a method used in the United States to survey and identify land parcels; Survey township, a square unit of land, six miles (~9.7 km) on a side, done by the U.S. Public Land Survey System

4. Baseline (surveying) - Wikipedia

   en.wikipedia.org/wiki/Baseline_(surveying)

   In a triangulation network, at least one distance between two stations needs to be measured to calculate the size of the triangles by trigonometry. In relative Global Navigation Satellite System (GNSS) surveying, a baseline is the line between two GNSS receivers to determine the 3D coordinate difference.

5. Public Land Survey System - Wikipedia

   en.wikipedia.org/wiki/Public_Land_Survey_System

   The Public Land Survey System (PLSS) is the surveying method developed and used in the United States to plat, or divide, real property for sale and settling. Also known as the Rectangular Survey System, it was created by the Land Ordinance of 1785 to survey land ceded to the United States by the Treaty of Paris in 1783, following the end of the ...

6. Gunter's chain - Wikipedia

   en.wikipedia.org/wiki/Gunter's_chain

   Gunter's chain (also known as Gunter's measurement) is a distance-measuring device used for surveying. It was designed and introduced in 1620 by English clergyman and mathematician Edmund Gunter (1581–1626). It enabled plots of land to be accurately surveyed and plotted, for legal and commercial purposes.

7. What is a property survey, and how do I get one? - AOL

   www.aol.com/finance/property-survey-one...

   Key takeaways. A property survey legally defines the boundaries of a plot of land. Mortgage lenders and/or title companies may require one when you're buying a house.