Struve Geodetic Arc Points | Explore Tornio Like A Local

Struve Geodetic Arc Points

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The Struve chain is a triangular chain between the Arctic Ocean and the Black Sea. It explored the shape and size of the globe in the 19th century. The Struve chain is a UNESCO World Heritage Site. Six of the selected World Heritage s…Open the full description

The Struve chain is a triangular chain between the Arctic Ocean and the Black Sea. It explored the shape and size of the globe in the 19th century. The Struve chain is a UNESCO World Heritage Site. Six of the selected World Heritage sites are located in Finland. Measuring points are not only historically important, but also excellent viewpoints.

Measurements of the triangle chain began in 1816 and were completed in 1855. The chain consists of 258 basic triangles and 265 basis points. The northernmost point is located in Norway near the Hammerfest on the Arctic Ocean and the southernmost is on the Black Sea in Ukraine. In Finland, the Struve chain was formerly known as the Russian-Scandinavian degree measurement, since it originally covered only two countries, Russia and Sweden.

The shape of the globe was proved to be polarized when, in 1736-1737, a French scientist Pierre-Louis Moreau de Maupertuis (1698-1759) measured the degree of Lapland in the Tornio River Valley.

Lapland degree measurement Lapland's degree measurement ranged from Tornio in 1736-37 all the way to Pello. The measurement showed that the globe was flattened at its poles
The degree measurement of Lapland confirmed that the north longitude is shorter by the Newtonian laws of physics than the corresponding south longitude by France. Measurements were made with fairly rudimentary instruments and included measurement errors, so the results still contained a great deal of uncertainty.

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