Year: 2014
Type: article
Abstract: Declassified Hexagon stereo spy images have near-global coverage extending back to the 1970’s, yet remain a largely untapped resource for land change studies. Unavailable satellite exterior orientation data for these images make digital elevation model (DEM) extraction difficult in terms of time and accuracy. A new automated workflow for DEM extraction is presented that eliminates the need for manual ground control point selection. The method is applied to reconstruct a DEM from 1974 imagery over a large glacierized region in the Bhutan Himalayas. Glacier changes over several decades are visualized using a DEM differencing method. These results demonstrate the value of Hexagon imagery when applied to land change studies.
Authors: Joshua A. Maurer, S. Rupper
Language: English
Subfield: Ocean Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W920362670