Three-dimensional point cloud of slope failures in the Sensuikyo Valley (Aso City, Kumamoto, Japan) obtained by UAS-based SfM-MVS photogrammetry / UASとSfM多視点ステレオ写真測量を用いた3次元点群モデルの例（熊本県阿蘇市仙酔峡）

This is an example of 3D point cloud by Structure-from-Motion (SfM) Multi-View Stereo (MVS) photogrammetry. The 3D point cloud was produced from thousands of aerial photographs taken by small unmanned aerial vehicles (UAV), or unmanned aircraft or aerial system (UAS). The spectrum of colors indicates different information given to each point: red-green-blue (RGB) color, normalized differential vegetation index (NDVI) calculated using a near infrared camera data, topographic shade by eye-dome lighting (EDL), morphological roughness, and surface curvature. These data are readily obtained by SfM-MVS photogrammetry, and can be effectively used for various applications in geomorphology and related studies. For more details on SfM-MVS photogrammetry, see our review article in this issue (p. 321-343).

(Yuichi S. Hayakawa, Hiroyuki Obanawa, Hitoshi Saito, Shoichiro Uchiyama)

www.researchgate.net/publication/304674520_SfMduoshidians...