Survey is very important for building construction. Establishment of the suitable control net and choice of the proper methods of survey can get quick and accurate survey.
测量是建筑施工中非常重要的工作，建立合适的控制网，选择合适的放样方法，使测量快速准确。
Objective To introduce a quick, efficient, accurate and digital method of 3s spatial technology for snail survey in ditches.
目的介绍一种采用3s空间技术，具有快速、高效、准确、数字化特点的钉螺调查方法。
The RTK technology has obtained the widespread applications by its superiority of accurate measuring, quick speed and so on in the fast static survey, the quasi-dynamic survey and the dynamic survey.
RTK技术以其测量精度高、速度快等优势在快速静态测量、准动态测量和动态测量中获得了广泛的应用。
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