Hynek, Bernhard; Binder, Daniel; Verhoeven, Geert; Schöner, Wolfgang (2024): Digital elevation model and orthofoto of Freya Glacier 2013 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.972889
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Published: 2024-10-10 • DOI registered: 2024-11-08
Abstract:
We surveyed Freya Glacier (Northeast Greenland) in August 2013 using a structure-from-motion approach with terrestrial imagery. Between 11th and 18th August 2013 we took oblique overlapping photographs of the glacier surface from about 450 locations on the slopes on both sides of the glacier using a Nikon D7100 digital single lens reflex camera with a 20 mm fixed lens. Simultaneously with the image acquisition, we surveyed ~100 natural Ground Control Points (GCPs) using a differential GNSS (Global Navigation Satellite System) receiver (Fig. 2). We surveyed the upper part of the glacier on the 11th and 12th of August 2013, when the glacier surface was almost snow free. A snowfall event on 14th August followed by a period of low visibility marked the end of the melt season. On 18th August 2013, we surveyed the lower part of the glacier. Surface ablation between the survey dates was below 0.15 m and was partly compensated by an average fresh snow height of 0.10 m. The DEM of the glacier has a horizontal resolution of 1m and the elvation has an RMSE at the check points of 0.20 m. The DEM and the orthofoto are projected to UTM (zone 27N, epsg:32627) and to orthometric heights (egm96). The data also contain the glacier outline of Freya Glacier in 2013 as a shapefile.
Related to:
Hynek, Bernhard; Binder, Daniel; Citterio, Michele; Larsen, Signe H; Abermann, Jakob; Verhoeven, Geert; Ludewig, Elke; Schöner, Wolfgang (preprint): Accumulation by avalanches as significant contributor to the mass balance of a High Arctic mountain glacier. https://doi.org/10.5194/tc-2023-157
Project(s):
Julius Payer Research Grant (JPRG)
Coverage:
Latitude: 74.390000 * Longitude: -20.830000
Date/Time Start: 2013-08-11T00:00:00 * Date/Time End: 2013-08-18T00:00:00
Event(s):
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | File content | Content | Hynek, Bernhard | |||
| 2 | Geospatial vector, shapefiles | Shapefile | Hynek, Bernhard | |||
| 3 | Raster graphic, GeoTIFF format | GeoTIFF | Hynek, Bernhard | Nikon D7100 digital single lens reflex camera, combined with Global Navigation Satellite System (GNSS) measurements |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
7 data points
Data
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| 1 Content | 2 Shapefile | 3 GeoTIFF |
|---|---|---|
| DEM of the glacier and glacier outline | Freya_Outline_2013.zip | dem_Freya_2013_1m.tif |
| Orthofoto upper part | Ortho_Freya_2013_upper_part.tif | |
| Orthofoto lower part | Ortho_Freya_2013_lower_part.tif |