地物点测量精度的自评定方法研究

Study on self-evaluation of culture feature's points

本文以地物特征点之间的几何条件建立条件方程,通过平差计算得到地物点测量的精度,由于不同于传统的地物点高精评定方法(对已测完的地物,再架设仪器测量特征点,用两次结果的差值评定地物点精度),故称为地物点测量精度的自评定法。其特点:一是通过平差计算可得到地物特征点测定中误差、地物面积的中误差和面积相对中误差;二是使基础地理数据有很好的几何上的一致性;三是绘图和精度同步,即当用平差后坐标绘图的同时,便知道其点位精度和面积精度。通过全站仪对直角楼房测量实验证明本文方法是可行的。

In this paper, condition equations are established on the basis of geometric relations. The accuracy of the feature points of object can obtain after condition adjustment. Because this evaluation method is different from traditional method, this method is called accuracy self-evaluation method. There are three characteristics. Firstly, RMSE （root mean square error） of a feature point and an area, and relative error can be determined after condition adjustment. Secondly, data of a culture feature has good consistency. Finally, geometric figure and accuracy of an object are determined simultaneously. It is verified that the method proposed in this paper is practicable by measuring a building with total station.