In this paper, the methods of drawing contour line from terrain map, the vector of contour line and generating elevation data from vector data are discussed.
论述了从地形图中提取等高线、对等高线矢量化以及通过矢量数据生成高程数据的实现方法。
2
Elevationof outdoor terrace: keep in line with the peripheral roads and sidewalk.
室外地坪标高:与周边市政道路和人行道保持一致。
3
The precondition of RG line being as datum of time-depth conversion is that the RG line is equivalent to the smooth lineof surface elevation.