带状地形无人机航测中像控点布设对空三精度影响的研究

Research on the influence of photo-control-points layout on aero-triangulation accuracy by UAV aerial in zonal terrain

无人机航测是新兴的一种测量技术手段,越来越普遍地应用于各种土地工程领域。对于带状地形区域的航测,如果按照传统的布点方式,需要进行大量的野外布设像控点工作,增加了实施难度。本文通过对5种无人机控制点布设方案(传统的航测布点方案和4种适合无人机航测的布点方案)进行空三精度对比实验,实验一种新的控制点布设方案。与传统的基于航带式布设方法相比,仅需要数量较少的像控点便能够满足1∶2 000地形图精度要求,从而大大减少了外业工作量。

As a new leading-edge technology,UAV aerial survey is being widely applied to various fields of land engineering.For the aerial survey in ribbon constructions,it would have too many photo-control-points to layout,which increases the difficulty of implementation if we according to the way of traditional photogrammetry.By designing the five solutions of laying control points(traditional photogrammetry's solution of laying control points and four kinds of UAV aerial photogrammetry's solutions of laying control points),we compare with accuracy of aerotriangulation the five solutions and find out a new solution.Compared with the traditional solution based on strip,this solution takes less points to be able to reach the standard of precision of topographic Map at 1∶2 000,and reduces a lot of fieldwork.