控制点分布对航摄仪区域网平差精度的影响

Influence of control points distribution on accuracy of block adjustment based on ADS data

针对推扫式航摄仪在测图中应用越来越广,大比例尺测图需要利用地面控制点辅助建立精确的空三模型,但目前对推扫式影像的地面控制点布设方案的研究较少的问题,该文针对ADS80航摄仪的影像数据,设计了7类控制点布设方案,并利用九参数平差模型对各布设方案进行了平差解算,获得了各布设方案下的区域网平差精度。在此基础上分析了不同控制点布设方案对平差精度的影响,探讨了针对推扫式航摄仪地面控制点的最优化布设方案,并针对外业控制点的布设提出了一些建议,以供参考。

With the advantage of special imaging mechanisms and easy operations in interior process- ing, push-broom stereo aerial photographic cameras have been widely used today. Ground control points are needed to establish accurate aerial triangulation model in large scale mapping, yet there are few studies about the ground control point plans in push-broom stereo aerial photography. In this paper, 7 kinds of ground control point plan were designed specified to photographic data of ADSS0 camera; nine-parameter adjustment model was used to calculate adjustment results; precisions of area network adjustment results in different plans were acquired; influences of different planning on the results were analyzed; optimal ground control point plan for push-broom stereo aerial photography was discussed; suggestions and references to operational organizations on field ground control point planning were given.