What is the name of the founder of the famous chain of survey triangulations stretching from Hammerfest to the Black Sea?
Tartu Observatory The Tartu Observatory (Estonian: "Tartu Observatoorium" ) is the largest astronomical observatory in Estonia. It is located on the Tõravere hill, about 20 km south-west of Tartu in Nõo Parish, Tartu County. The old Tartu Observatory located in Tartu city centre, is known internationally for its connection to Friedrich Georg Wilhelm von Struve and the Struve Geodetic Arc, of which it is the first reference point.
Simon von Stampfer Simon Ritter von Stampfer (October 26, 1792 (according to other sources 1790), in Windisch-Mattrai, Archbishopric of Salzburg today called Matrei in Osttirol, Tyrol – November 10, 1864 in Vienna) was an Austrian mathematician, surveyor and inventor. His most famous invention is that of the stroboscopic disk which has a claim to be the first device to show moving images. Almost simultaneously similar devices were produced independently in Belgium (the phenakistiskop), and Britain (the zoetrope).