| _version_ | 1867168230946111488 |
|---|---|
| author | Hynek, Bernhard Binder, Daniel Larsen, Signe H |
| author_facet | Hynek, Bernhard Binder, Daniel Larsen, Signe H |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | 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. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_972888 |
| institution | PANGAEA |
| language | en |
| publishDate | 2024 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Digital elevation model and orthophoto of Freya Glacier 2021 Hynek, Bernhard Binder, Daniel Larsen, Signe H Digital Elevation Model, calculated from aerial imagery, DJI Phantom 4 RTK UAV; File content; Freya_Glacier; Freya_Glacier_UAV2021; GacioBasis_Freya; Geospatial vector, shapefiles; glacier elevation; GlacioBasis and Freya Glacier Monitoring; Greenland; Northeast Greenland; Raster graphic, GeoTIFF format; structure-from-motion photogrammetry; UAV; Unmanned aerial vehicle 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. |
| title | Digital elevation model and orthophoto of Freya Glacier 2021 |
| topic | Digital Elevation Model, calculated from aerial imagery, DJI Phantom 4 RTK UAV; File content; Freya_Glacier; Freya_Glacier_UAV2021; GacioBasis_Freya; Geospatial vector, shapefiles; glacier elevation; GlacioBasis and Freya Glacier Monitoring; Greenland; Northeast Greenland; Raster graphic, GeoTIFF format; structure-from-motion photogrammetry; UAV; Unmanned aerial vehicle |
| url | https://doi.org/10.1594/PANGAEA.972888 |