In construction of hydroelectric project, small range DTM data are often needed for topographicsurveying, mapping, excavated form detection, earthwork calculation and so on.
Topographic mapping and application of an ordinary surveying one of the core content.
地形图的测绘和应用是普通测量学的核心内容之一。
3
Through the analysis on every procedure of surveying 1:500 topographic map with the method of transit mapping, the position error of 1:500 topographic map is got.