论文部分内容阅读
施测导线为测量中主要的工作,关系着整个测量的准确性与进度。用经纬仪测量导线,一般使用下列几个方法:1、内角法;2、右角法;3、偏角法;4、方位角法。这几个方法的选择,取决于该项工作所要求的精密度与计算的便利。需要精确测定的三角网或闭口导线,多用内角法或右角法复测或叠测;开口导线,如铁路、公路、运河、水渠等,普通均用偏角法,以便利用曲线表及用切线法或弦线法绘画中线;方位角法手续简便,随时可与磁针相校对,亦为测量人员所乐用。就速度而言,方位角法较前数者为优,因为它无须对准
The test wire is the main work in the measurement, which is related to the accuracy and progress of the whole measurement. With theodolite measuring wire, the following methods are generally used: 1, the internal angle method; 2, the right angle method; 3, the declination method; 4, the azimuth method. The choice of these methods depends on the precision and computational convenience required for the work. Need to determine the precise determination of the triangle network or closed wire, multi-angle method or the right corner of the retest or stack test; open wire, such as railways, highways, canals, drains, etc., are generally used declination method, in order to use the curve table and the tangent method Or chord method drawing center line; Azimuth method is simple, ready to proofread with magnetic needle, but also for the measurement staff. In terms of speed, the azimuth method is superior to the former because it does not require alignment