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Fig. 2 | Journal of Applied Volcanology

Fig. 2

From: Lava flow hazard prediction and monitoring with UAS: a case study from the 2014–2015 Pāhoa lava flow crisis, Hawai‘i

Fig. 2

Left Side: Flow chart summary of the processing workflow beginning with raw aerial images geotagged with onboard GPS (grey); Structure from Motion software processing steps (blue); digital point cloud filtering using LAStools (green); DEM processing to extract paths of steepest descent via ArcGIS hydrology workflow (orange). Right side: (top) raw point cloud before any filtering, (middle) filtered point cloud following removal of vegetation and other structures, (bottom) Hillshade representation of “bare-earth” DEM generated from the filtered point cloud

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