Hynek, Bernhard; Binder, Daniel; Larsen, Signe H (2024): Digital elevation model and orthophoto of Freya Glacier 2021 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.972888
Always quote citation above when using data! You can download the citation in several formats below.
Published: 2024-10-11 • DOI registered: 2024-11-09
Abstract:
In July 2021 we surveyed the surface of Freya Glacier (Northeast Greenland). On 29th and 31st July 2021, we used a UAV (DJI Phantom 4 RTK) to obtain overlapping image series of the glacier surface. On 29th July, we photographed 80% of the glacier surface (lower part) and finished the drone flights on 31st of July. On 28th and 29th of July 2021, we surveyed ~100 mainly artificial GCPs on the glacier surface using a differential GNSS receiver and a base station. During the survey, surface ablation between 28th and 31st July was less than 0.2 m. Using a structure from motion approach, we could reconstruct 95% of the glacier surface with a very high level of detail and vertical accuracy. The DEM of the glacier has a horizontal resolution of 1m and the elevation has an RMSE at the check points of 0.18 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 2021 as a shapefile.
Supplement 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):
GlacioBasis and Freya Glacier Monitoring (GacioBasis_Freya)
Coverage:
Latitude: 74.390000 * Longitude: -20.830000
Date/Time Start: 2021-07-29T00:00:00 * Date/Time End: 2021-07-31T00:00:00
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 | outline | ||
| 3 | Raster graphic, GeoTIFF format | GeoTIFF | Hynek, Bernhard | Digital Elevation Model, calculated from aerial imagery, DJI Phantom 4 RTK UAV | DEM | |
| 4 | Raster graphic, GeoTIFF format | GeoTIFF | Hynek, Bernhard | Orthofoto |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
4 data points
Data
All files referred to in data matrix can be downloaded in one go as ZIP or TAR. Be careful: This download can be very large! To protect our systems from misuse, we require to sign up for an user account before downloading.
| 1 Content | 2 Shapefile (outline) | 3 GeoTIFF (DEM) | 4 GeoTIFF (Orthofoto) |
|---|---|---|---|
| DEM and orthofoto of the glacier, and glacier outline | Freya_Outline_2021.zip | dem_Freya_2021_1m.tif | OF_2021_v1_30cm.tif |