It took Friedrich Georg Wilhelm von Struve 39 years to measure the Earth. He started in 1816 at the Dorpat Observatory in Estonia. From there, under his leadership, a team of scientists triangulated a line up to Hammerfest in Norway, and down to the Black Sea.
When he finished in 1855, Struve had the first accurate measurement of a meridian and was able to calculate the exact size and shape of the Earth. It was a huge leap forward for science and helped cartographers to make more precisely scaled maps.
|Tartu Student Lock-Up||2019||0.2km||site_ao|
|Kolkja Kala-ja Sibularestora (Kolkja Old Believers Restaurant)||2019||34.6km||site_ao|
|Old Believers Museum||2019||34.8km||site_ao|
|Karl Ernst von Baer Statue||2019||0.3km||site_ao|
|The World’s Largest Hoberman Sphere||2019||0.9km||site_ao|
|Lasva Water Tower||2018||63.3km||site_ao|
|The Fascinating Home of the National Archives of Estonia||2018||2.1km||site_ao|
|Struve Geodetic Arc||2005||78.6km||site_whs|
|A New Sculptural Wood Pavilion Stands Proud In Estonia||2019||80.6km||post|
About the source: Atlas Obscura
Atlas Obscura aims 'to inspire wonder and curiosity about the incredible world we all share'. You can contribute to their collection on their website.