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控制測量

  控制測量簡介:在測區內,按測量任務所要求的精度,測定一系列控制點的平面位置和高程,建立起測量控制網,作為各種測量的基礎,這種測量工作稱為控制測量;控制網具有控制全局,限制測量誤差累積的作用,是各項測量工作的依據。對于地形測圖,等級控制是擴展圖根控制的基礎,以保證所測地形圖能互相拼接成為一個整體。對于工程測量,常需布設專用控制網,作為施工放樣和變形觀測的依據。

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