The Struve Geodetic Arc is a significant historical geodetic survey that was conducted in the 19th century, primarily to measure a degree of the meridian arc (the measurement of the Earth's curvature) across several countries in Eastern Europe and Scandinavia. The arc stretches approximately 2,820 kilometers (about 1,750 miles) from Hammerfest in Norway to the Black Sea port of Sulina in Romania.
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