Coastal bluff point clouds derived from SfM near Elwha River mouth, Washington from 2016-04-18 to 2020-05-08

Point Clouds of an approximately 2.0 km alongshore reach of seaward-facing
coastal bluff faces on the Strait of Juan de Fuca, Washington State, were
derived using structure-from-motion (SfM) photogrammetry from digital
photos collected at least quarterly between 2016 and 2022. The point
clouds were derived to assess spatial and temporal patterns of erosion on
the bluff face and deposition at the base of the bluff. Photos from
Miller, et al. (2022) were aligned using a modified USGS published
workflow (Over, et al., 2022) with Agisoft Metashape Professional 1.8.5.
Photos were aligned within a single chunk in a 4D approach described by
Wernette, et al. (2022), and the sparse point cloud was filtered by
reconstruction uncertainty (Ru) and projection accuracy (Pa). Dense point
clouds were generated independently for each survey date by disabling all
cameras except for a single photo date and then generating the dense
cloud. This was repeated for each of the 30 photo survey dates, resulting
in 30 dense point clouds (one point cloud per photo survey date).