Digital outcrop modelling using “structure-from- motion” photogrammetry: Acquisition strategies, validation and interpretations to different sedimentary environments
Digital outcrop modelling using “structure-from- motion” photogrammetry: Acquisition strategies, validation and interpretations to different sedimentary environments
复制标题
使用“运动结构”摄影测量进行数字露头建模：不同沉积环境的采集策略、验证和解释
DOI：
10.1016/j.jsames.2019.102325
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发表时间：
2019
影响因子：
1.8
通讯作者：
D. Arizteguí
中科院分区：
文献类型：
--
作者：
Andrés Bilmes;L. D’Elía;L. López;S. Richiano;Augusto Varela;M. D. P. Álvarez;J. Bucher;I. Eymard;Martin Muravchik;J. Franzese;D. Arizteguí
运动-多视图立体构造（SfM-MVS）是一种相对较新的技术，正在被采用在沉积体系分析中。该技术特别适用于侧重于地质体的分布、几何形状和量化的研究，包括沉积形式和构造结构的分析。这种摄影测量方法允许生成虚拟露头（VO）和高分辨率数字地形模型（DTM）。与机载LiDAR扫描或地面激光扫描等更复杂和昂贵的技术相比，SfM-MVS是一种快速低成本的方法，通过仔细使用地面控制点，可以产生与其他数字测量方法相媲美的空间精度模型。在这项研究中，SfM-MVS的有效性在一系列定量的沉积和盆地分析的案例研究进行了讨论。重点放在研究问题如何定义的工作流程策略，知道的局限性，错误的来源和潜在的效用，SFM-MVS技术时，一个虚拟的沉积系统进行解释。三个不同的沉积环境的案例研究，以前用传统的野外工作技术分析，选择和重新分析。对于每一个案例研究的目标是解决定量问题，不可能确定不使用VO或DTM。问题包括：（i）与逆冲系统相关的生长地层序列的几何恢复;（ii）全新世气候最佳期后相对海平面下降期间沿岸的山脊的堆积模式;（iii）封闭湖盆过去44年期间湖平面下降的量化。结果表明，该技术在沉积体系分析中具有重要的应用价值。然而，由于地质解释取决于生成的模型的质量，VO或DEM的规划和构建沿着验证对于确保可靠的结果至关重要。
Structure from Motion–Multi-View Stereo (SfM-MVS) is a relatively new technique that is being adopted in the analysis of sedimentary systems. The technique is especially applicable to studies which focus on the distribution, geometry and quantification of geological bodies including the analysis of sedimentary forms and tectonic structures. This photogrammetric method allows for generating virtual outcrops (VO) and high-resolution digital terrain models (DTMs). In comparison with more sophisticated and expensive techniques such as airborne LiDAR scanning or terrestrial laser scanning, SfM-MVS is a fast low-cost method which with careful use of ground control points, can produce models which are comparable to other digital survey methods for spatial accuracy. In this study, the effectiveness of SfM-MVS in a series of quantitative case studies in sedimentary and basin analyses is discussed. Focus is placed on how the research questions define the workflow strategy to know the limitations, sources of error and potential utility that the SFM-MVS technique has when a virtual sedimentary system is interpreted. Three case studies of different sedimentary environments, previously analyzed with traditional fieldwork techniques, were selected and re-analyzed. For each case study the objective was to resolve quantitative questions that were not possible to determine without the use of VO or DTMs. Questions include: (i) geometrical restoration of a growth strata succession associated with thrust systems; (ii) stacking patterns of littoral ridges during a relative sea-level fall after the Holocene climatic optimum; and (iii) quantification of lake level fall during the past 44 years of a closed lake basin. The results of the work show that the technique has significant application in the analysis of sedimentary systems. However, since geological interpretations depend on the quality of the models that are generated, planning and construction of the VO or DEMs along with their validation are essential to ensure reliable results.