SfM data of the Kongur normal fault (Qimugan site), Pamir, China, Aug. 2018

This dataset covers the terraces at the outlet of the Qimugan river (E 74.592°, N 39.089°), located in the Muji basin in Pamir, northwestern China. These terraces are offset by vertical motion along the frontal Kongur normal fault dipping west. We collected 4676 images (5472 × 3648 pixels) covering a ~1.9 km2 of the research area using a consumer UAV DJI Phantom Professional V2.0. The Structure from Motion (SfM) point clouds was produced by using the commercial Photoscan Pro software (Photoscan). The SfM point cloud density was ~195 points/m2 which could yield a ~7.16 cm resolution DEM. In this project, the Surfer software was utilized to build the 0.2 m resolution DEM from the dense point cloud. This project was funded by the China National Science Foundation (Grant Numbers: 41802229 and 41772221). The primary motivation for the acquisition of the data set was a study of young fluvial terrace riser degradation. Before taking aerial photographs, 13 ground control points (GCPs) were distributed throughout the study area for georeferencing purposes. Then, 11 GCPs were implemented in the processing, removing the other two GCPs (marker 4 and 6) with big errors). The survey of the markers was completed using a Trimble Geo 7X GNSS system that involves two units: fixed reference station and roving receiver. Each target center was recorded at least 15 times by the roving receiver with a 5 cm receiving accuracy. Then, precise positions of these markers were obtained by GPS post-processing software of Trimble Company. All points were acquired in WGS84/ UTM zone 43N.

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