Quaternary surface ruptures surveyed with SfM, Panamint Valley, CA

To identify and map regions of distributed faulting in late Holocene alluvium, we generated 20 high-resolution (0.5 cm), 0.16 km2 structure-from-motion digital surface models using drone-based imagery. These data were collected, as part of a Master’s thesis, to resolve regions that lacked existing lidar coverage, and regions where small (0.5 - 1 m) offsets in young alluvium are poorly resolved by existing 0.5 m NCALM lidar DEMs (Figures 1-2). Data were collected at eight locations, over the course of three field seasons between March – November 2021. Each survey location (Figure 2) was given a unique name identifier based on the region and the survey takeoff/return point: 1) Mama Scarp Wash (MSW), 2) Central Alluvial Fan Wasteland (CAFW), 3) Carbonate Hill (CH), 4) Radio Tower Southeast (RTSE), 5) Radar Tower East (RTE), 6) Radar Tower North (RTN), 7) Radar Tower Southwest (RTSW), and 8) Radar Tower West (RTW). Each survey was collected using a DJI Phantom IV drone, including 6 - 8 targets of known dimensions and locations within the surveyed region, located using an EMLID Reach differential GPS. All surveys were collected using predetermined flight plans and parameters, programmed with DroneDeploy. For DroneDeploy specifications, see “Survey Methods” section within the metadata document.

为识别并绘制晚全新世冲积层中分布式断层区域的分布图，我们利用无人机影像生成了20个高分辨率（0.5 cm）、面积为0.16 km²的运动恢复结构数字表面模型（Structure-from-Motion Digital Surface Model）。这些数据是作为硕士论文的一部分采集的，旨在解决现有激光雷达（lidar）覆盖缺失的区域，以及现有0.5 m NCALM激光雷达数字高程模型（Digital Elevation Model，DEM）难以清晰分辨年轻冲积层中微小（0.5-1 m）位移的区域（图1-2）。数据采集于2021年3月至11月期间的三个野外季，共涉及八个地点。每个调查地点（图2）根据所在区域及调查起降点赋予了唯一名称标识：1）Mama Scarp Wash（MSW）、2）Central Alluvial Fan Wasteland（CAFW）、3）Carbonate Hill（CH）、4）Radio Tower Southeast（RTSE）、5）Radar Tower East（RTE）、6）Radar Tower North（RTN）、7）Radar Tower Southwest（RTSW）、8）Radar Tower West（RTW）。每次调查均使用DJI Phantom IV无人机完成，调查区域内包含6-8个已知尺寸和位置的靶标，这些靶标通过EMLID Reach差分全球定位系统（Differential GPS）定位。所有调查均采用预先设定的飞行计划和参数，相关参数详见元数据文档中的“调查方法”章节。