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Surveying Error facts

While investigating facts about Surveying Errors and Surveying Errors In Measurement, I found out little known, but curios details like:

In NYC there is a pizza sized plot of land sitting in the middle of a sidewalk. As a result of a surveying error, it was left as part of an estate. The heirs refused to donate the plot of land to NYC, instead putting a mosaic on the plot in 1922. The mosaic is still there, surrounded by sidewalk

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A small Italian hamlet unexpectedly gained independence for four centuries due to a surveying error during a land sale. The territory was known as the Republic of Cospaia from 1440 to 1826.

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In my opinion, it is useful to put together a list of the most interesting details from trusted sources that I've come across answering what are the errors in chain surveying. Here are 9 of the best facts about Surveying Errors And Adjustments and Surveying Error Of Closure I managed to collect.

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  1. The state of Texas sold off nearly 1000 square miles, but kept it anyway. They sold a total of 98,300 sq. miles in the Compromise of 1850, but surveying errors placed the new border in the wrong place. This land west of the agreed-upon border was never returned to New Mexico.

  2. [TIL]: A surveying error caused a 14" drill bit to puncture a salt mine, causing a lake to drain into the mine. The drill rig, several barges and a large area of land, were all pulled into the resulting whirlpool.

  3. Due to a surveying error splitting a town in half by state they have Oregon addresses and California driver's licenses

  4. Louisiana has a parish (county) cut into two noncontiguous parts because of an uncorrected surveying error. 30% of the population speaks French at home

  5. Systematic errors while surveying the Mason-Dixon line were due to gravity effects from the Allegheny Mountains deflecting the surveyors' plumb bobs. This led to Cavendish determining the density of the earth.

  6. The Northwest Angle, known simply as the Angle by locals, and coextensive with Angle Township, is a part of northern Lake of the Woods County, Minnesota. Except for minor surveying errors, it is the only place in the United States outside Alaska that is north of the 49th parallel

  7. Due to a surveying error, a small part of Kentucky is entirely surrounded by Missouri and Tennessee

surveying error facts
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