Struve geodesic arc point

Struve geodesic arc point

The construction of a geodetic arc is one of the largest in the 19th century. the first half attempts to explore and
to determine the size and shape of the Earth. Professor of the University of Tartu, astronomer Friedrich Georges
Wilhelm Struve developed a methodology for integrating the land of a meridian - a semicircle connecting the earth
northern and southern poles, - to measure the bow. He formed the triangulation (triangular) chain, which
consists of 259 triangles with special vertices. Southwest Arc lasted
from the Danube River to the Black Sea to the Fugennes Arctic Ocean. The bow is intersecting
current states like Norway, Sweden, Finland, Estonia, Latvia, Lithuania, Belarus, Ukraine
and Moldova.

XIX century it was the most accurately measured and longest arc of the meridian. His measurement results yet
The century has been used to calculate and correct the Earth's ellipsoid - not completely regular in shape
ball - parameters. Based on this work by FGW Struv, in 1888, Earth's meridian length
Geodesist A. Bonsdorf has calculated.

Currently ten European countries are protected by 34 differently marked Struve geodetic arcs
points, three of them in the territory of Lithuania - in the villages of Meshkūniai, Paliepukiai and Gireišiai. Struve
geodetic arc is one of the four values ​​of global significance in Lithuania - in 2005 he was
Included in the UNESCO World Heritage List. A tower stood at Mount Mayoko in the Molėtai district,
The part of the Struve geodetic arc, which measured the sea level.