近几年来,短程光电测距仪在我国的冶金、城建、交通、地质、水利水电等许多部门普遍运用。由于光电测距误差小,高程精度也相应提高,因此,光电测距高程不仅地形测量中(图根控制的高程)使用,而且为施工测量、变形观测建立精密三维控制网提供了方便条件。国外,已用于几百公里长的 In recent years, short-range photoelectric range finder in China’s metallurgy, urban construction, transportation, geology, water conservancy and hydropower and many other departments in general use. Due to the small error of photoelectric distance measurement and elevation accuracy, the elevation of photoelectric measurement is not only used in terrain measurement (the elevation of Tugan control), but also provided convenient conditions for establishing precise three-dimensional control network in construction survey and deformation observation. Abroad, has been used for hundreds of kilometers long