Runge, Alexandra; Kremer, Luis; Barth, Sophia; Inauen, Cornelia; Rettelbach, Tabea; Grosse, Guido (2024): Backpack LiDAR-based digital elevation models from the Perma-X expedition in West Alaska (2022) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.963283
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Abstract:
During the Arctic Land Expedition Perma-X in West Alaska (2022-07-28 -- 2022-08-21), several LiDAR scans were acquired using a backpack laser scanning system (GreenValley LiBackpack DGC50). The surveys were carried out on the Baldwin Peninsula and on the Seward Peninsula. The goal of the campaign was to quantify permafrost landscape change by mapping various permafrost thaw features such as thaw slumps, gullies, and degraded ice wedge polygons. These features are predominantly less than 1 km2 in size. The 3D point cloud data from the LiDAR backpack were used to generate Digital Elevation Models (DEMs) of the thaw features. The point cloud processing workflow for these DEMs included point cloud georeferencing, filtering, and ground classification. In total, 15 DEMs were derived at different locations during this campaign. In addition to change detection, the accurate field data are suitable for model parameterization and validation from Earth observation data.
Keyword(s):
Further details:
Project(s):
Perma-X (Perma-X)
Coverage:
Median Latitude: 66.409615 * Median Longitude: -163.005577 * South-bound Latitude: 65.367590 * West-bound Longitude: -164.681280 * North-bound Latitude: 66.917260 * East-bound Longitude: -162.001860
Date/Time Start: 2022-08-05T03:29:33 * Date/Time End: 2022-08-19T01:58:26
Event(s):
AK-Land_2022_NWAlaska_BAP22A_01 (BAP22A) * Latitude Start: 66.864530 * Longitude Start: -162.572090 * Latitude End: 66.867020 * Longitude End: -162.565350 * Date/Time: 2022-08-18T02:24:47 * Campaign: AK-Land_2022_NWAlaska (Perma-X Scan Alaska 2022) * Basis: AWI Arctic Land Expedition * Method/Device: Terrestrial laser scanning (TLS) * Comment: Ice wedge polygons
AK-Land_2022_NWAlaska_BAP22A_02 (BAP22A) * Latitude Start: 66.864320 * Longitude Start: -162.567230 * Latitude End: 66.866750 * Longitude End: -162.560870 * Date/Time: 2022-08-18T04:04:16 * Campaign: AK-Land_2022_NWAlaska (Perma-X Scan Alaska 2022) * Basis: AWI Arctic Land Expedition * Method/Device: Terrestrial laser scanning (TLS) * Comment: Partially drained lake and gully
AK-Land_2022_NWAlaska_BAP22B_01 (BAP22B) * Latitude Start: 66.910840 * Longitude Start: -162.402780 * Latitude End: 66.913160 * Longitude End: -162.398490 * Date/Time: 2022-08-15T23:32:36 * Campaign: AK-Land_2022_NWAlaska (Perma-X Scan Alaska 2022) * Basis: AWI Arctic Land Expedition * Method/Device: Terrestrial laser scanning (TLS) * Comment: Gully
Comment:
The 15 DEMs (.tif) map specific permafrost thaw features (e.g., thaw slumps, gullies, degrading ice wedge polygons). The DEMs were derived from point clouds. The workflow included point cloud georeferencing, filtering, and ground classification. The GreenValley LiAir or the Leica AS10 base station was used for georeferencing. The base stations recorded correction signals for more than 2 hours per site. The coordinate system of the DEMs is NAD83/UTM3N (EPSG: 26903) and the heights are ellipsoidal heights. The spatial resolution is 20 centimeters.
The locations of the 15 DEMs are visualized in the file DEMS_location_map.png.
The DEMs metadata include site name, date, mapped permafrost thaw feature, location coordinates and base station used. For each DEM, the boundary (xmin,xmax,ymin,ymax) and the centroid (latitude,longitude) are given. The projected coordinates have been reprojected into the geographic coordinate system (WGS84; EPSG:4326). The format of the positions (lat/long) is therefore in decimal degrees. The DEMs were georeferenced using either the LiAir base station or the Leica AS10 base station. The base station used for each file is indicated in the last column of the metadata.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Runge, Alexandra | |||
| 2 | Data type | Data type | Runge, Alexandra | |||
| 3 | Site | Site | Runge, Alexandra | |||
| 4 | Identification | ID | Runge, Alexandra | Scan id | ||
| 5 | DATE/TIME | Date/Time | Runge, Alexandra | Geocode | ||
| 6 | Feature | Feature | Runge, Alexandra | Thaw feature | ||
| 7 | Resolution | Res | m | Runge, Alexandra | Spatial resolution | |
| 8 | Coordinate reference system | CRS | Runge, Alexandra | DEM coordinate system | ||
| 9 | Latitude, southbound | Latitude south | Runge, Alexandra | xmin | ||
| 10 | Latitude, northbound | Latitude north | Runge, Alexandra | xmax | ||
| 11 | Longitude, westbound | Longitude west | Runge, Alexandra | ymin | ||
| 12 | Longitude, eastbound | Longitude east | Runge, Alexandra | ymax | ||
| 13 | LATITUDE | Latitude | Runge, Alexandra | Geocode – centroid | ||
| 14 | LONGITUDE | Longitude | Runge, Alexandra | Geocode – centroid | ||
| 15 | Gear | Gear | Runge, Alexandra | Base station type | ||
| 16 | Raster graphic, GeoTIFF format | GeoTIFF | Runge, Alexandra | Wearable LiDAR Scanning System, GreenValley, LiBackpack DGC50 | ||
| 17 | Raster graphic, GeoTIFF format (File Size) | GeoTIFF (Size) | Bytes | Runge, Alexandra | Wearable LiDAR Scanning System, GreenValley, LiBackpack DGC50 |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Basic curation (CurationLevelB)
Size:
180 data points