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地形測量

地形測量

文字:[大][中][小] 手機頁面二維碼 2015/12/18     瀏覽次數:    

  地形測量是根據規范和圖式的要求,對地物、地貌及其他地理要素進行的測量。對地球表面的地物、地貌在水平面上的投影位置和高程進行測定,并按一定比例縮小,用符號和注記繪制成圖的工作。

  地形測量包括圖根控制測量和碎部測量,按“先控制后碎部”的程序進行作業。一般先以較高精度的控制點作為測區首級控制,例如某等級的三角點(見三角測量)、導線點(見導線測量)、水準點(見國家水準網)等,然后逐步加密精度較低的控制點,最后布設專為碎部測量應用的圖根控制點,簡稱圖根點。
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