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大陆几何中心——兰州。如果以兰州为圆心、2500km为半径画一个大圆,那么,我国大陆领土就基本上在这个圆内。兰州古代是“丝绸之路”的要冲,今天是欧亚第二陆桥上的重镇,西北地区最大的重工业城市。 大地坐标中心(大地原点)——陕西泾阳。大地原点是国家水平控制网中推算各点大地坐标起算点。共和国成立以后,我国曾在北京设立过大地原点,用它推算出的坐标为“1954年北京坐标系”。后来又在西安市北面的泾阳县境内设立新的大地原点,根据该点
Continental geometric center - Lanzhou. If you draw a great circle with Lanzhou as the center and a radius of 2500km, then mainland China’s territory is basically within this circle. Lanzhou ancient times was the key point of the “Silk Road.” Today, it is the major town on the second continental bridge of Europe and Asia, and the largest heavy industrial city in the northwest region. Geodetic Center (earth origin) - Fuyang, Shaanxi. The origin of the earth is the starting point of the geodetic coordinates of each point calculated in the national level control network. After the establishment of the Republic, China established the origin of the earth in Beijing, and the coordinate calculated by it was “Beijing Coordinate System of 1954”. Later, a new earth origin was established in the territory of Suiyang County to the north of Xi’an City. According to this point,