Description: This dataset comprises annotated boulders within were manually digitized within a high-resolution multibeam echosounder (MBES) dataset. The entire multibeam echosounder survey campaign covers a 7.5 km long segment of the River Rhine (km 747.0–754.5, Düsseldorf, Germany) and the data acquisition was conducted 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). Since the survey area is characterized by the occurrence of boulders, a manual annotation of those boulders was carried out for each 500 m section of the survey area. An overall annotation consistency was supported by applying common interpretation criteria and by cross-referencing potential boulders within the bathymetry, hillshade and backscatter datasets during the digitization. Thus, characteristic indicators of quartzite blocks, including elevated bathymetric structures, high backscatter intensity and associated morphological features such as scour marks, were jointly assessed. Subsequently, the provided dataset comprises the 2053 manually digitized polygon annotations as .shp file as well as their diameter, position, shape area, highest point and height in a .csv file. The data are suited for AI/ML model training (e.g., semantic segmentation) as well as the validation of automated boulder detection methods.
Global identifier:
Doi(
"10.1594/PANGAEA.997228",
)
DataMeasurements(
DataMeasurements {
domain: Unspecified,
station: None,
measured_variables: [
"Binary Object",
"Binary Object (File Size)",
"Binary Object (Media Type)",
"Event label",
"File content",
],
methods: [],
},
)
Tags: Fluss ? Deutschland ? Gewässervermessung ? Künstliche Intelligenz ? Daten ? Datenerhebung ? Multibeam Echosounder ? River Rhine ? annotated dataset ?
Bounding boxes: 6.74983° .. 6.75219° x 51.2504° .. 51.2512°
License: Creative Commons Namensnennung 4.0
Language: Englisch/English
Issued: 2026-10-13
Modified: 2026-10-13
Last harvest: 27.10.2026 04:06
Time ranges: 2024-07-20 - 2024-07-30
Accessed 2 times.