Photogrammetry-derived digital surface model and orthoimagery of the Usibelli Group type section, Suntrana Creek, Alaska
The Alaska Division of Geological & Geophysical Surveys (DGGS) conducted a photogrammetric survey in the Suntrana Creek area near Healy, Alaska. This survey includes most of the type section for the Cenozoic Usibelli Group, an economically significant coal-bearing succession. Aerial photographs and Global Navigation …