2026-06-03T00:41:53Zhttp://doidb.wdc-terra.org/oaip/oai

oai:doidb.wdc-terra.org:70832021-06-15T11:46:47ZDOIDBDOIDB.CRC1211

false4DOIDB.CRC1211 10.5880/CRC1211DB.39 Walk, Janek Janek Walk RWTH Aachen, Department of Geography Bartz, Melanie Melanie Bartz University of Cologne, Institute of Geography Stauch, Georg Georg Stauch https://orcid.org/0000-0002-8046-140X RWTH Aachen, Department of Geography Brückner, Helmut Helmut Brückner University of Cologne, Institute of Geography Lehmkuhl, Frank Frank Lehmkuhl RWTH Aachen, Department of Geography CRC1211 Database (CRC1211DB) 2021 Environment Ground-based remote sensing Geomorphology GIS Deutsche Forschungsgemeinschaft http://dx.doi.org/10.13039/501100001659 CRC 1211 Earth - Evolution at the Dry Limit 18.12.2020 en Data table 1 Datasets CSV 1 [Creative Commons] Attribution-NonCommercial 4.0 International This dataset contains grain sizes of bright surface clasts extracted digitally from very high resolution aerial imagery for the coastal alluvial fan Guanillos (GUA) in northern Chile (21.97°S, 70.17°W). The largest diameters (a-axes) of bright clasts were derived by global thresholding of RGB orthomosaics (OM) constructed based on surveys using an unmanned aerial system (UAS). Depending on the spatial resolution of the OMs, the minimal detectable grain size is 20 to 22 mm. Restricted to detailed areas of interest (AOI), the gravelometric data is attributed to the four alluvial fan surface generations, or morphostratigraphic units, Q1 to Q4. Results are stored in a .csv table. Chile -70.17 -21.97