Applying close range digital photogrammetry in soil erosion studies
Applying close range digital photogrammetry in soil erosion studies
复制标题
DOI：
10.1111/j.1477-9730.2010.00584.x
复制
发表时间：
2010-09-01
影响因子：
2.4
通讯作者：
Armstrong, Alona
中科院分区：
文献类型：
--
作者：
Heng, B. C. Peter;Chandler, Jim H.;Armstrong, Alona
由降雨和地表径流引起的土壤侵蚀是一个重要的环境问题。研究这一现象需要对土壤表面地形和形态进行精确的高分辨率测量。本文提出的近景数字摄影测量与斜收敛配置作为一个有用的技术，这样的测量，在水槽规模的实验研究的背景下。该技术的精度进行评估，通过比较三角剖分的解决方案和所得到的DEM与不同的连接点分布和控制点的测量，以及通过比较从不同的图像中提取的DEM相同的表面。独立的测量获得了使用地面激光扫描仪与来自摄影测量的DEM进行比较。结果表明，需要一个更强大的几何配置，以提高精度。他们还认为，相机透镜模型不完全适合在这项研究中的大对象的深度。然而，摄影测量的输出可以提供有用的地形信息，土壤侵蚀研究，提供了技术的局限性，适当考虑。
Soil erosion due to rainfall and overland flow is a significant environmental problem. Studying the phenomenon requires accurate high-resolution measurements of soil surface topography and morphology. Close range digital photogrammetry with an oblique convergent configuration is proposed in this paper as a useful technique for such measurements, in the context of a flume-scale experimental study. The precision of the technique is assessed by comparing triangulation solutions and the resulting DEMs with varying tie point distributions and control point measurements, as well as by comparing DEMs extracted from different images of the same surface. Independent measurements were acquired using a terrestrial laser scanner for comparison with a DEM derived from photogrammetry. The results point to the need for a stronger geometric configuration to improve precision. They also suggest that the camera lens models were not fully adequate for the large object depths in this study. Nevertheless, the photogrammetric output can provide useful topographical information for soil erosion studies, provided limitations of the technique are duly considered.