2W9F+62 Karhuvaara, Sweden
The measurement point at Perevaara is the only site among Sweden's World Heritage objects where the original markings have been preserved. The point is located on the hill Alanen-Perevaara, which is completely overgrown with forest. Perevaara is situated about 25 km northwest of Haparanda, near Karungi, on a forested elevation. From a small road to the measurement point, you need to walk 400 meters. In the forest at the top of the hill, you can see an engraved cross on a solid rock. This is the only surviving trace of the measurement carried out here by Selander and Skogman in the mid-19th century. Information signs are located at the parking lot, at the beginning of the path, and at the measurement point itself.
The measurement point is located at the highest point of Mount Perevaara, about 25 km northwest of the town of Haparanda. From highway 99, turn onto highway 730. After about 1 kilometer, turn north onto a secondary road. After 1 kilometer, there is a parking lot and an information board. From the parking lot, you walk 5 kilometers along a forest road to a trail leading to the summit, approximately 400 meters away.
The Struve Arc, once known as the "Russian" and later the "Russian-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, allowing 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 laid 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 all 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 of them were found to be heavily damaged. Therefore, only the best-preserved points—34 in total—were included in the World Heritage site.
Sources:
http://www.gototrip.com/publications/geodezicheskaya-duga-struve
