An evaluation of a low-cost pole aerial photography (PAP) and structure from motion (SfM) approach for topographic surveying of small rivers
An evaluation of a low-cost pole aerial photography (PAP) and structure from motion (SfM) approach for topographic surveying of small rivers
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对用于小河流地形测量的低成本杆式航空摄影（PAP）和运动结构（SfM）方法的评估
DOI：
10.1080/01431161.2019.1630782
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发表时间：
2019
影响因子：
3.4
通讯作者：
Richard M. Johnson
中科院分区：
文献类型：
--
作者：
F. Visser;A. Woodget;A. Skellern;Jake Forsey;J. Warburton;Richard M. Johnson
摘要 为了更好地了解河流的形态和过程，地貌学家需要高分辨率的河流地形调查。机载激光扫描 (ALS)、地面激光扫描 (TLS) 和运动结构 (SfM) 摄影测量等连续数据收集方法提供了收集此类数据集的方法。 SfM 和基于激光的地形测量方法的比较已经证明了特定地点的优点和缺点。调查偏好在很大程度上取决于具体的项目要求，这表明需要针对不同应用的最佳实践示例。本研究展示了杆式航空摄影 (PAP) 在绘制小河流廊道地形图时如何为 SfM 数据收集提供特定优势。数字高程模型 (DEM) 是使用三种不同的测量方法针对英国坎布里亚郡的一条小高地溪流 Coledale Beck 100 米的范围创建的。其中包括 (a) 使用 SfM 摄影测量处理从 5 米伸缩杆收集的图像，(b) 使用无人机系统 (UAS) 收集的图像，也使用 SfM 摄影测量处理，以及 (c) 使用 TLS 收集的点云数据。所有三种方法都产生足够质量的 DEM，以增强我们对河流形态和过程的理解，近距离方法（TLS 和 PAP）的 DEM/点云分辨率为 0.01 m，c.远程 UAS 方法为 0.02 m。总体而言，TLS 平均误差 (0.123–0.135 m) 几乎是 UAS 和 PAP (0.037–0.103 m) 误差的两倍，标准偏差高出约 25%。然而，对于不同的表面覆盖类型（即植被、暴露和淹没表面），结果差异很大，对于暴露的砾石表面，TLS 优于其他方法。 PAP 方法的数据采集速率大约是其他两种方法的一半（PAP、TLS 和 UAS 分别为 430 平方米/小时，而 PAP、TLS 和 UAS 分别为 845 和 730 平方米/小时）。当考虑到设备成本和易用性时，PAP方法提供了一种从小河流收集地形数据的有效方法。
ABSTRACT To better understand fluvial forms and processes, geomorphologists have a need for high-resolution fluvial topographic surveys. Continuous data collection approaches such as airborne laser scanning (ALS), terrestrial laser scanning (TLS), and structure from motion (SfM) photogrammetry provide methods to collect such data sets. Comparisons of SfM and laser-based approaches for topographic surveys have demonstrated site-specific benefits and drawbacks. Survey preference is largely dependent on specific project requirements, indicating a need for examples of best practice for different applications. This study demonstrates how pole aerial photography (PAP) provides specific advantages for SfM data collection when mapping the topography of small river corridors. Digital elevation models (DEMs) were created using three different surveying approaches for a 100-m reach of Coledale Beck, a small upland stream in Cumbria, United Kingdom. This included (a) imagery collected from a 5-m telescopic pole processed using SfM photogrammetry, (b) imagery collected using an unmanned aircraft system (UAS), also processed using SfM photogrammetry, and (c) point cloud data collected using a TLS. All three approaches produce DEMs of sufficient quality to enhance our understanding of fluvial forms and processes, with DEM/point cloud resolutions of 0.01 m for the close-range methods (TLS and PAP) and c. 0.02 m for the longer-range UAS method. Overall, TLS mean errors (0.123–0.135 m) are almost twice as large as the UAS and PAP (0.037–0.103 m) errors, and the standard deviation is approximately 25% higher. However, results vary significantly for different surface cover types (i.e. vegetated, exposed and submerged surfaces), with TLS outperforming the other approaches for exposed gravel surfaces. Data acquisition rates for the PAP approach are approximately half those of the two other methods (430 m2/hour versus 845 and 730 m2/hour for PAP, TLS, and UAS, respectively). When equipment costs and ease of use are taken into consideration, the PAP approach provides an effective way of collecting topographic data from small rivers.
DOI：
10.1016/j.isprsjprs.2013.04.009
发表时间：
2013-08-01
影响因子：
12.7
作者：
Lague, Dimitri;Brodu, Nicolas;Leroux, Jerome
通讯作者：
Leroux, Jerome