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在二等三角网内直接插入多个低级插点(四等三角点)的布网方法,能迅速地获得精度高,密度大的插点。这样对选点,造埋和观测的外业工作带来一定的方便,相应的可以缩短外业的工作量,这是符合多,快,好,省的一种布网方案。过去,插网一般均采用间接观测平差,这种方法末知数较多,法方程式系数的组成及答解等工作量远较条件观测平差为大。本文采用条件观测分组平差,提出以纵横座标条件方程式的形式作为垒面插网的符合条件,得出较为简便形式的平差计算公式,在实用上甚为方便。
In the second triangle network directly into the number of low-level interpolation point (fourth-degree triangle point) cloth network method, can quickly get high precision, high density plug. This will bring some convenience to the selection, burial and observation of the field work, which in turn can shorten the workload of the field. This is a network plan that meets the needs of more, faster, better and more provincial projects. In the past, intercalation nets generally used indirect observation adjustment, this method more unknown, the composition of the French equation coefficient and the workload of the answer is far greater than the conditional observation adjustment. This paper adopts conditional observation grouping adjustment, and puts forward that the form of vertical and horizontal coordinate conditional equation is used as the matching condition of base-plate meshing, and the simple formula for calculating the adjustment is obtained, which is very convenient in practice.