The origin of the earth is located in Shijisi Village, Yongle Town, Jingyang County, north of Xianyang City, which is the geographic center of China. The origin of the earth consists of four major parts: the central sign, the instrument table, the main building, and the projection table. The three-dimensional building with a height of more than 25 meters above the ground has a total of seven floors. The top floor is an observation room with an instrument table inside; the top of the building is an integral semi-circular roof made of glass fiber reinforced plastic, which can be opened by electronic control to observe celestial bodies; the central sign is buried in the Inside the basement of the themed building. Soon after the completion of the geodetic origin, the national basic gravity point and astronomical basic point were added and measured. Background information - The geodetic origin is also called "geodetic datum point", that is, the starting point for calculating geodetic coordinates in the national horizontal control network. In the early days of the founding of the People's Republic of my country, the geodetic coordinate system used in our country was measured from other places, and its coordinate origin was the Bolkov Observatory. This situation is particularly incompatible with the construction and development of our country. To this end, the state has organized manpower and collected and analyzed a large amount of data since 1975. According to the requirements of the "origin", the topography, geology, geotectonics, astronomy, gravity and geodetic surveys of Zhengzhou, Wuhan, Xi'an, Lanzhou and other central areas of China and other factors on-the-spot investigation, and then determine the origin of the earth in Shijisi Village, Yongle Town, Jingyang County.
大松树叶子
