空间测边网三维平差

对由观测的空间边长组成的空间测边网进行三维平差,可以获得待定点的三维坐标,从而省去高程测量和繁琐的概算。这种平差方法已有人论及,但仅限于工测网,且由于平差在独立空间直角坐标系中进行,使它在应用上发生了困难。本文提出将空间测边网纳入参心空间直角坐标系中进行平差,使得起算数据和平差结果与常用的大地经纬度、高斯坐标和高程联系起来,从而开拓了它的应用前景。本方法不仅适用于工测网和图根网,也适用于大地网。

THREE-DIMENSIONAL ADJUSTMENT OF SPACE TRIANGULATION

Three-dimensional coordinates can be obtained from the three dimensional adjustment,which is performed with the space triangulation networks composed of observed space sides, thus eliminating elevation measurements and the over elaborate estimation. This method was discussed by some people, but only about the scope of engineering surveying. As the adjustment is perfomed in the independent space coordinate system, it is difficult to use it in practical application. It is suggested in this paper that the space triangulation network be adjusted in the reference space coordinate system, so that the data and the results of the adjustments can be linked with the geodetic latitude and longitude, the guass coordinates, as well as elevation. So, its application is expanded. This adjustment applies not only to engineering surveying, but also to the geodetic and mapping controlling networks, as the paper indicates.