Photogrammetry Digital Elevation Model and Orthomosaic of Thores Glacier, Ellesmere Island, Canada ...

• Main Authors: Kochtitzky, William, Copland, Luke, Culley, Alex, Girard, Catherine, Iqualuk, Pilipoosie, Vincent, Warwick
• Format: Dataset
• Language: English
• Published: Canadian Cryospheric Information Network 2022
• Subjects: Ellesmere Island; glacier*
• Online Access: https://dx.doi.org/10.21963/13275; https://www.polardata.ca/pdcsearch?doi_id=13275

On July 28, 2019, we conducted an air photo survey from a helicopter flying at an altitude of 500-800 m above the glacier (~1100-1200 m a.s.l) to create an orthomosaic and DEM of the glacier surface using the Structure from Motion technique, following the methodology of Thomson and Copland (2016). We flew the helicopter in sets of parallel lines spaced ~250 m apart across two different sections of the glacier: eight lines were SW-NE trending, parallel to the main trunk of the glacier. Another nine lines were SE-NW trending, approximately perpendicular to the previous flight path and extending from the southern end of Thores Lake to the northwest edge of the glacier terminus. ... : This dataset is used to quantify the detailed physical characteristics of Thores Glacier and its interaction with adjacent Thores Lake, including glacier extent, surface features, and surface elevation during a July 2019 field campaign. These measurements were limited to the lower part of the glacier (mainly ablation area) due to access limitations and snow cover higher up limiting the effectiveness of the photogrammetry survey. We took a series of pictures of Thores Glacier, Ellesmere Island, Canada in July, 2019 to build a three-dimensional model of the glacier. These photos show what the glacier looked like at that time including streams on the glacier surface. ...