Photogrammetry-derived orthoimagery and elevation for Kotlik, Alaska, collected July 9-10, 2021
The State of Alaska Division of Geological & Geophysical Surveys (DGGS) collected low-altitude aerial images from an unmanned aerial vehicle (UAV) on July 9-10, 2021 and used Structure-from-Motion (SfM) photogrammetry to produce a digital surface model (DSM) and orthoimage of Kotlik. The orthoimagery and elevation …