讨论矿区（城市）测量控制网改造的优化设计问题．优化设计分４个阶段：零阶段设计讨论控制网的基准选择问题；第１阶段设计解决点位优化问题；第２阶段设计解决费用最优问题，即观测权的最优分配问题；第３阶段设计计算最少加测角度，使之达到精度要求．整个设计采用坐标未知数的协因数阵的迹最小时为最优． Discuss the optimization design of the reconstruction of the measurement control network in the mining area (city). The optimization design is divided into four stages: the zero stage design discusses the reference selection problem of the control network; the first stage design solves the spot optimization problem; the second stage design solves the optimal cost problem, that is, the optimal distribution of observation rights; the third stage Design calculations plus at least measured angle, so as to achieve the accuracy requirements. The entire design uses the co-ordinates of unknown coordinates of the coordinates of the smallest when the best.