The present applied calculation method is very complicated and low calculating accuracy, and this method can not determine the drilling hole position.
目前实际中采用的计算方法很繁杂，计算精度低，而且不能给出最优的钻孔位置。
The design of cable dome is divided into three parts: pre-stressed calculation, static load applied calculation and variation load applied calculation.
索穹顶结构分下述三个状态进行计算：预张拉状态、施加屋面恒载时的计算和屋面活荷载作用下的计算；
At last, this paper narrates several issues, they are conversion of data structure, conversion of coordinate system, cutting out and disparting of map, the management of layer and applied calculation.
最后简单说明了数据结构转换、坐标系转换、图形裁剪与分幅、图层管理以及应用计算等功能。
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