ESTONIA ~Struve Geodic Arc-Tartu Observatory-UNESCO

...A scientific UNESCO site...thinking this chain was accomplished around 200 years ago is simply astonishing...it's my second point after the one in Norway...still a lot to go (◕‿-). Thanks a lot Patrick!!

© Bernt Rostad The Observatory in Tartu is on a hill overlooking the town. The upper portion of the observation tower can be winched around so that the observation opening for the telescope can be oriented 360 degrees.

The Struve Geodetic Arc is a chain of survey triangulations stretching from Hammerfest in Norway to the Black Sea, through 10 countries and over 2,820 km, which yielded the first accurate measurement of a meridian.The chain was established and used by the German-born Russian scientist Friedrich Georg Wilhelm von Struve in the years 1816 to 1855 to establish the exact size and shape of the earth.

In 2005, 34 of the triangulation points – the ones that are distinguished by a landmark – became protected and included as cultural memorials on the UNESCO world heritage list. This makes it the longest inscription on the WHS.

Stamps:

Oxeye Daisy
(Issued 17-01-2007)
Christmas
(Issued 19-11-2015)