基于UCE影像的像控网设计方案对空中三角测量精度的影响

发布时间：2018-12-15 04:54

【摘要】：对基于胶片影像的传统摄影测量,其像控点的密度,现行航空摄影测量外业规范中有明确要求,但对基于多镜头复合的数码影像航空摄影测量,其像控点的密度,现行规范中无明确规定。因此,针对这种数码影像的航空摄影测量,寻求经济、合理的像控网设计方案,有重要的现实意义。本文以270km2的某平缓丘陵测区为例,针对基于UCE数码影像的1:1000比例尺摄影测量的空中三角测量,按密度逐步加大方式,提出了14种不同密度的像控点布网方案,采用网络RTK采集像控点平面和高程坐标,利用Inpho软件对这14种布网方案,进行了常规空中三角测量试验和有POS辅助的空中三角测量试验,得出以下结论:(1)像控点密度越稀,外业工作量越小,但精度越低。当像控点密度低到一定程度时,空中三角测量成果会达不到摄影测量的精度要求。(2)对于常规空中三角测量,在270km2平缓丘陵测区内只布25-28个像控点,仍能满足精度要求,此时的像控点密度约为每10km2一个像控点,与传统摄影测量相比,像控点数量可减少40%左右。(3)对于POS辅助空中三角测量,在270km2平缓丘陵测区内,由熟练的作业员操作,即使只布4个像控点,仍能满足精度要求,此时的像控点密度降低到了每70 km2一个像控点,与传统摄影测量相比,像控点数量可减少90%以上。
[Abstract]:For the traditional photogrammetry based on film image, the density of the image control point is clearly required in the current field of aerial photogrammetry, but the density of the image control point for the digital image aerial photogrammetry based on multi-lens composite, There is no explicit provision in the current norms. Therefore, it is of great practical significance to seek economic and reasonable image control network design for aerial photogrammetry of this digital image. Taking a gentle hilly area of 270km2 as an example, for aerial triangulation of 1: 1000 scale photogrammetry based on UCE digital image, according to the method of increasing density step by step, this paper puts forward 14 kinds of image-controlled point layout schemes with different densities. The plane and elevation coordinates of image control points were collected by using network RTK, and the conventional aerial triangulation test and the aerial triangulation experiment assisted by POS were carried out by using Inpho software. The following conclusions are obtained: (1) the thinner the image control point density, the smaller the field workload, but the lower the precision. When the density of image control points is low to a certain extent, the aerial triangulation results will not meet the precision requirements of photogrammetry. (2) for conventional aerial triangulation, there are only 25-28 image control points in the 270km2 flat hill survey area. The density of image control point is about one point per 10km2. Compared with traditional photogrammetry, the number of image control points can be reduced by about 40%. (3) for POS aided aerial triangulation, in the 270km2 levelling hilly area, By skilled operator, even if only 4 image control points are distributed, the image control point density can be reduced to one image control point per 70 km2. Compared with traditional photogrammetry, the number of image control points can be reduced by more than 90%.
【学位授予单位】：湘潭大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P231.4

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