利用已有的丈量控制点对原地面高程进行放样，确定开挖深度。
By means of the existing measurement control points on the ground elevation for lofting, determine the excavation depth.
RTK是一种高效、快速、高精度的GPS丈量方法，可以像全站仪在小区域进行碎部丈量、放样、几何应用等工作。
RTK is a high efficiency, high speed and high accuracy GPS surveying method which can be like total station to do detailed survey, loft, geometric application etc in localized region.
应用推荐