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yong xu ni ping cha fa kuo jian kuang qu kong zhi wang de ping cha mo xing
Pages: 47-50
Year: Issue:  3
Journal: Geotechnical Investigation & Surveying

Keyword:  平差模型虚拟平差整体平差随机模型函数模型序贯平差扩建矿区控制网三角网协因数阵;
Abstract: This papar discusses the problem of renew and extension in mining area network. The adjustment function model and random medel of the new network are set up to make the network be extended on the same accuracy grade as the old one and the coordinates of the old network points keep unchanged.
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