摘要
GPS在测绘领域应用具有测量精度高，选点灵活，费用低，全天候作业，观测时间短等优点。为此，三峡二期工程施工控制引进了该项技术，采取“分层布网．两级控制”的原则，即以二期工程首级控制网点为已知点，对分层布设的加密控制网点进行测量．并对其中的两次加密控制网进行了大地测量和GPS静态测量，以比较测量结果的可靠性。测量、比较结果表明．用GPS测量法建立二期工程施工控制网可以满足精度要求。
The GPS technique has being used widely in survey field and has such advantagesas high accuracy, flexible station positioning, low cost, all weather operation and short observationtime. Therefore, the technique has been lntroduced in the phase - II works of the Three Gorges Project. The principle of ' networking in layers and controlling in two levels' is applied, that is, thetop level control network for the phase - II works is regarded as the known points, the dense controlnetworks placed in layers are observed, of which geodetic and GPS static survey network densifiedfor two times is executed to examine the reliability of the survey results. The observations and comparative results have shown that the construction control network built by the GPS can meet the construction accuracy requirement for the phase - II works of the Three Gorges Project.[
出处
《中国三峡建设》
1999年第11期14-16,21,共4页
China Three Gorges Construction
关键词
控制测量
GPS测量
三峡
二期工程
施工测量
Control survey Survey by GPS Survey by RTK Three Gorges Project Phase Ⅱ works
