Walter, Annika L.; Fickrie, Muhammad; Heffner, Ellen; Sternberg, Harald: Annotated boulder occurrence dataset using quartzite block detection derived from multibeam bathymetry processed data of SV DVOCEAN, Rhine River, Germany [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.997228 (dataset in review)
Abstract:
ANNOTATED BOULDER ABSTRACT
This dataset comprises high-resolution multibeam echosounder (MBES) bathymetry and backscatter data collected in a 7.5 km segment of the River Rhine (km 747.0–754.5, Düsseldorf, Germany) between July 24th and 31st, 2024. The survey, conducted with a Kongsberg EM2040P MKII multibeam echosounder operated at a frequency of 300 kHz, achieved a point density of ≥ 160 points/m² and met the IHO Special Order standards (horizontal uncertainty ≤ 15 cm, vertical uncertainty ≤ 3 cm). Furthermore, the dataset includes 8,654 manually annotated quartzite blocks (mean area: 1.90 m², mean height above riverbed: 0.28 m), which were used to train a U-Net convolutional neural network (CNN) for an automated detection. The dataset comprises the raw (.db) bathymetric data, the applied sound velocity profiles (.csv), the pre-processed and filtered bathymetric data (0.25 m grid as .xyz and .tif) with their uncertainty metrics (.xyz, .tif), the computed and cleaned backscatter mosaics (available as 0.20 m and 0.25 m pixel size mosaics in .xyz and .tif format) and the manually digitized polygon annotations (.shp). The data are suited for hazard mapping, geomorphological studies, AI/ML model training (e.g., semantic segmentation) as well as the validation of automated boulder detection methods.
Related to:
Idun, Eric (2025): AI-Driven Detection of Quartzite Blocks in the River Rhine Using CNN U-Net with Backscatter and Bathymetric Data. Journal of Applied Hydrography, HN134, https://dhyg.de/images/hn_ausgaben/HN134.pdf
Kraft, Markus; Hollmann, Nils; Torres, Kelly; Idun, Eric; Heffner, Ellen; Walter, Annika L.; Sternberg, Harald (2025): Detection of quartzite blocks in the River Rhine. Journal of Applied Hydrography, HN130, https://doi.org/10.23784/HN130-04
Walter, Annika L.; Fickrie, Muhammad; Heffner, Ellen; Sternberg, Harald: Multibeam bathymetry processed data (Kongsberg EM2040 entire dataset, Generic sensor format) of SV DVOCEAN, Rhine River, Germany [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.996935
Walter, Annika L.; Fickrie, Muhammad; Heffner, Ellen; Sternberg, Harald: Multibeam bathymetry processed data (Kongsberg EM2040 entire dataset) of SV DVOCEAN, Rhine River, Germany [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.997223
Walter, Annika L.; Fickrie, Muhammad; Heffner, Ellen; Sternberg, Harald: Sound velocity profiles of multibeam bathymetry processed data (Kongsberg EM2040 entire dataset) of SV DVOCEAN, Rhine River, Germany [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.997235
Walter, Annika L.; Muhammad, F.; Sternberg, Harald (in prep.): High-resolution annotated multibeam bathymetry and backscatter dataset for quartzite block detection. Data Descirptor. Scientific Data
Coverage:
Median Latitude: 51.250800 * Median Longitude: 6.751010 * South-bound Latitude: 51.250400 * West-bound Longitude: 6.749830 * North-bound Latitude: 51.251200 * East-bound Longitude: 6.752190
Date/Time Start: 2024-07-20T13:56:45 * Date/Time End: 2024-07-30T11:25:45
Event(s):
dvocean1_0_Underway-1 * Latitude Start: 51.251200 * Longitude Start: 6.752190 * Latitude End: 51.250400 * Longitude End: 6.749830 * Date/Time Start: 2024-07-20T13:56:45 * Date/Time End: 2024-07-30T11:25:45 * Campaign: dvocean1 * Basis: DVocean * Method/Device: Kongsberg EM2040 multibeam echosounder (Kongsberg Maritime) (EM2040) * Comment: Event shows start/end point (date/time & coordinates) of first/last data record using Kongsberg EM 2040 multibeam echosounder
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Walter, Annika L. | |||
| 2 | Binary Object | Binary | Walter, Annika L. | |||
| 3 | Binary Object (Media Type) | Binary (Type) | Walter, Annika L. | |||
| 4 | Binary Object (File Size) | Binary (Size) | Bytes | Walter, Annika L. | ||
| 5 | File content | Content | Walter, Annika L. |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Status:
Curation Level: Enhanced curation (CurationLevelC) * Processing Level: PANGAEA data processing level 3 (ProcLevel3)
Size:
16 data points