Skip to main content
Progress in Earth and Planetary Science
Fig. 3 | Progress in Earth and Planetary Science

Fig. 3

From: Spatial accuracy assessment of unmanned aerial vehicle-based structures from motion multi-view stereo photogrammetry for geomorphic observations in initiation zones of debris flows, Ohya landslide, Japan

Fig. 3

Results of the UAV-SfM measurements. a Orthophotograph of the entire observation area and DEMs of the differences (DoD). b Between DEMTLS and DEMSfM. c Between DEMTLS and DEMSfM-ICP. Because both DoDs were computed such that DEMSfM or DEMSfM-ICP was subtracted from DEMTLS, the cold (positive value) and warm (negative value) colors indicate domains where the elevations of DEMSfM or DEMSfM-ICP are relatively high and low compared to DEMTLS, respectively. The TLS measurement focused on the downstream side of the initiation zone; therefore, there are blank domains indicated by the black color on the upstream side. The domain surrounded by the dotted red line indicates the area used for the validation

Back to article page