Ok. This answer is copy paste from wiki and translator.
Triangulation is one of the most important land surveying methods, which has been used, for example, in the creation of basic maps of Finland. The method was developed in Holland in the 17th century. The triangle grid used in measurements consists of fixed points that form triangles. Whenever the length of one side of a triangle is known, the others can be calculated using angles and at the same time find out the distance and location of the following points. Coordinates have been calculated for fixed points with the help of frame measurements, which can be used to measure other objects in the terrain.[3] Triangulation can be used to measure both distances and ground heights. The method has been used to find out, for example, the height of the peak of Mount Everest. Since triangulation is based on line of sight between fixed points, wooden triangulation towers were built to help. The towers were used to aid in frame measurements before moving to satellite positioning.
Three large triangulation measurements have been made in Finland. The first one was made in 1736–1737 in the Tornionjoki valley by Pierre-Louis Moreau de Maupertuis, who showed with his measurements that the Earth is flattened at the poles. Between 1830 and 1852, the Struve Chain, which ran from the Arctic Ocean to the Black Sea, was made, and based on the measurement results, a general map of Finland was published in 1873. The third one was started after Finland’s independence by the Geodetic Institute. The last triangulation tower was built in Finland in 1986, and the basic survey of all of Finland was completed a year later.
6 comments
Nipple
Property boundary marker
[Control points](https://www.maanmittauslaitos.fi/en/maps-and-spatial-data/datasets-and-interfaces/product-descriptions/control-points)
“kick it” would have my dad said
Ok. This answer is copy paste from wiki and translator.
Triangulation is one of the most important land surveying methods, which has been used, for example, in the creation of basic maps of Finland. The method was developed in Holland in the 17th century. The triangle grid used in measurements consists of fixed points that form triangles. Whenever the length of one side of a triangle is known, the others can be calculated using angles and at the same time find out the distance and location of the following points. Coordinates have been calculated for fixed points with the help of frame measurements, which can be used to measure other objects in the terrain.[3] Triangulation can be used to measure both distances and ground heights. The method has been used to find out, for example, the height of the peak of Mount Everest. Since triangulation is based on line of sight between fixed points, wooden triangulation towers were built to help. The towers were used to aid in frame measurements before moving to satellite positioning.
Three large triangulation measurements have been made in Finland. The first one was made in 1736–1737 in the Tornionjoki valley by Pierre-Louis Moreau de Maupertuis, who showed with his measurements that the Earth is flattened at the poles. Between 1830 and 1852, the Struve Chain, which ran from the Arctic Ocean to the Black Sea, was made, and based on the measurement results, a general map of Finland was published in 1873. The third one was started after Finland’s independence by the Geodetic Institute. The last triangulation tower was built in Finland in 1986, and the basic survey of all of Finland was completed a year later.
Earth zit