Two buildings were used to measure The Struve Geodetic Arc: one was the Tartu Observatory and the other was the Alatornio's Church in Tornio. The measument point in the clock tower was measured in 1842. The peak is about 40 meters above sea level, making the tower's view a good visibility to the following measuring points.
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The Struve Geodetic Arc is a triangular chain between the Arctic Ocean and the Black Sea. It explored the shape and size of the globe between 1816-1855. Six of the 34 selected World Heritage sites are located in Finland. Measuring points are not only historically important, but also excellent viewpoints.
The northernmost point is located in Norway near Hammerfest by the Arctic Ocean and the southernmost is in the Black Sea near Ukraine.