46233, Võivere, Võivere, 46233 Lääne-Viru County, Estonia
The Woibifer point is located in the village of Voivere in the Avanduse municipality, on private property. This point was a very important site of the Struve Geodetic Arc, as it was the endpoint of the baseline elements of triangulation.
In 1827, under the leadership of Friedrich Georg Wilhelm Struve, the Simona-Voivere baseline was measured. The endpoint of the baseline in Voivere is marked by a limestone foundation. The measurement of the Simona-Voivere baseline is part of the meridian arc measurement carried out between 1816 and 1855, aimed at determining the size and shape of the Earth.
Since June 12, 2020, an exhibition has been open on three floors of the Voivere windmill, telling the story of the measurement of the Struve Geodetic Arc, a UNESCO World Heritage site.
The Struve Arc, once known as the "Russian" and later the "Russo-Scandinavian Meridian Arc," is one of UNESCO’s World Heritage monuments. The arc consists of 265 triangulation points, where measurements were conducted from 1816 to 1852, enabling the precise determination of the Earth's size and shape.
The reference points of this triangulation network were marked in various ways on the terrain: hollows carved into rocks, iron crosses, stone pyramids, or specially installed obelisks. Often they were marked with sandstone bricks placed at the bottom of a pit; sometimes it was a granite cube with a cavity filled with lead, placed in a pit with cobblestones.
During the 8-year project to include the Struve Arc in the UNESCO list, special search and geodetic work was undertaken in each country to locate the original points. All information from the countries of the Struve Arc was collected, structured, and standardized.
Not all of the original points were found during the special search and geodetic work carried out in recent years with active cooperation from scientists of the interested countries, and many were found to be heavily damaged. Therefore, only the best-preserved points—a total of 34—were included in the World Heritage site.
Sources:
http://www.gototrip.com/publications/geodezicheskaya-duga-struve
https://www.visitestonia.com/en/voivere-baseline-of-the-struve-arc
