What is the Struve Geodetic Arc, which passes through Estonia?

Answer and explanation

Correct answer: D. A chain of survey points used to measure the shape of the Earth

  1. Step 1: The arc stretches through several countries from Norway to the Black Sea. Step 2. It is on the UNESCO World Heritage List. Answer: A chain of survey points used to measure the shape of the Earth. Why not the others: The other descriptions are not correct.

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