将测距仪所测的斜距换算成平距的方法和精度

随着科学的进步,测距仪在我国城市和矿山测量中得到广泛的应用。但是,当用单个测距仪测距时,因为角度测量和距离测量是分别进行的,所以经纬仪和测距仪的照准线是不重合的。这时就不能用传统的公式(S=Dcosα)计算平距。为此,本文介绍经纬仪和测距仪的照准线不重合时的计算公式.并分析其精度后得出:在大多数情况下,把测距仪所测的斜距换算成平距的误差 m_D可以忽略不计,即 m_s≈m_D。

The Conversion Method and Precision of Inclined Distance from Finder Data into Horizontal Distance

With the improvement of science,the finders are used wide spreadly in cities and mining survey of our country.When we use single finder to survey distance,both angle and distance are sur veyed in different times.Therefore,the datum line of transit. and finder are not overlapped.In this case,the traditional for- mula S=Dcos α can not be used in calculating the horizontal dis- tance. This paper introduces the conversion formula which represents un-overlapped datum line of transits and finders.As a result of precision analysis,the errors(m)caused by converting the inclined distances from finder data into horizontal distances may he neglected.It is m_S≈m_D.