Chalk Cliffs Channel Surveys derived from Structure-from-Motion (Under Revision)
Dates
Publication Date
2020-01-27
Time Period
2015-08-10
Time Period
2016-06-01
Citation
Rengers, F., 2020, Chalk Cliffs Channel Surveys derived from Structure-from-Motion: U.S. Geological Survey data release, https://doi.org/10.5066/F7CZ36BS.
Summary
Note: this data release is currently being revised and is temporarily unavailable. This data release contains two point clouds derived from structure-from-motion photogrammetry. The first survey was conducted on 10 September 2015 and the second survey was conducted on 1 June 2016. Each survey was designed to capture a 35-meter channel reach using digital photos (1187 photos were taken in the first survey and 1085 photos were taken in the second survey). Twenty-five bolts were drilled into the bedrock channel to serve as ground control points. We used a local coordinate system to create a reference frame, but the location of all of the ground control points are attached in the file called: GCPs_exported.txt. Agisoft photoscan was [...]
Summary
Note: this data release is currently being revised and is temporarily unavailable.
This data release contains two point clouds derived from structure-from-motion photogrammetry. The first survey was conducted on 10 September 2015 and the second survey was conducted on 1 June 2016. Each survey was designed to capture a 35-meter channel reach using digital photos (1187 photos were taken in the first survey and 1085 photos were taken in the second survey). Twenty-five bolts were drilled into the bedrock channel to serve as ground control points. We used a local coordinate system to create a reference frame, but the location of all of the ground control points are attached in the file called: GCPs_exported.txt. Agisoft photoscan was used to construct point clouds from the digital photos, and then sub-sampled the point clouds to a 1 cm spacing. The two subsampled point clouds are provided here in a las format. The .las files are open-source point cloud files and can be opened by any open-source point cloud viewer. Finally, the latitude/longitude of the center of the study area is: 38.733318, -106.187409.
This data was used in the paper: Rengers, F., Kean, J., Reitman, N., Smith, J., Coe, J., McGuire, L. 2020. The Influence of Frost Weathering on Debris Flow Sediment Supply in an Alpine Basin. Journal of Geophysical Research: Earth Surface. 10.1029/2019JF005369
We used from structure-from-motion photogrammetry to monitor sedimentation over a 9-month period in a channel that is prone to debris flows. The surveys can be used to show how much sediment accumulated during that time period as well as the spatial distribution of the sediment.
