Chalk Cliffs Channel Surveys derived from Structure-from-Motion (ver. 2.0, November 2026)
This data release contains four point clouds derived from structure-from-motion photogrammetry. Each survey was designed to capture a 35-meter channel reach using digital photos. The surveys were conducted on 10 September 2015, 1 June 2016, 15 September 2017 and 26 September 2018. 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 four 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.
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Complete Metadata
| accessLevel | public |
|---|---|
| bureauCode |
[ "010:12" ] |
| contactPoint |
{ "fn": "Francis Rengers", "@type": "vcard:Contact", "hasEmail": "mailto:frengers@usgs.gov" } |
| description | This data release contains four point clouds derived from structure-from-motion photogrammetry. Each survey was designed to capture a 35-meter channel reach using digital photos. The surveys were conducted on 10 September 2015, 1 June 2016, 15 September 2017 and 26 September 2018. 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 four 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. |
| distribution |
[ { "@type": "dcat:Distribution", "title": "Digital Data", "format": "XML", "accessURL": "https://doi.org/10.5066/F7CZ36BS", "mediaType": "application/http", "description": "Landing page for access to the data" }, { "@type": "dcat:Distribution", "title": "Original Metadata", "format": "XML", "mediaType": "text/xml", "description": "The metadata original format", "downloadURL": "https://data.usgs.gov/datacatalog/metadata/USGS.5a0b2426e4b09af898cb6efa.xml" } ] |
| identifier | http://datainventory.doi.gov/id/dataset/USGS_5a0b2426e4b09af898cb6efa |
| keyword |
[ "GHSC", "Geologic Hazards Science Center", "Geomorphology", "LHP", "Landslide Hazards Program", "USGS", "USGS:5a0b2426e4b09af898cb6efa", "earth science", "landslide hazard", "structure-from-motion photogrammetry" ] |
| modified | 2026-11-09T00:00:00Z |
| publisher |
{ "name": "U.S. Geological Survey", "@type": "org:Organization" } |
| spatial | -106.191, 38.737, -106.181, 38.7302 |
| theme |
[ "geospatial" ] |
| title | Chalk Cliffs Channel Surveys derived from Structure-from-Motion (ver. 2.0, November 2026) |
