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工程建设过程中,每个项目场地条件各不相同,特别是城市繁华区域,寸土寸金,这给中轴线测放带来了一定的难度。传统方法是增设已知点,照准该已知点再投测,在不通视的情况下只能采用增设中转点位的方法来完成测量工作。但是,正倒镜投点法不受地形限制,能解决通视困难的问题,同时使视线缩短,减小了照准误差和不考虑对中误差的影响,充分体现了经纬仪在空间立面(垂面)的运用。
During the process of project construction, each project site has different conditions, especially the bustling urban areas. The traditional method is to add a known point, look for the known point and then test it. In the case of not seeing, only the method of adding the transfer point can be used to complete the measurement. However, the inverted mirror projection method is not limited by the terrain, which can solve the problem of visual difficulty and shorten the sight line at the same time, reduce the errors in sighting and errors without considering the impact on the error, fully reflects the theodolite in the space facade Vertical) use.