Three new student projects about 3D surveying of the coast in Noordwijk

On 22 Feburary 2022 three groups of students went to the beach in Noordwijk to collect data for the course 3D-surveying of Civil and Offshore Infrastructure at TU Delft by R. Lindenbergh. The students study how to extract terrain at the beach and how sand-shapes appear from aeolian transport. Another group compares photogrammetry data and laser scanning data of the beach and dunes.

Lot’s of ‘flying sand’ called aeolian sand transport could be observed and will be studied with the help of the collected data.

Three storms in a row

From 16 February to 21 February 2022 three storms hit the Netherlands within only five days. The storms named Dudley, Eunice and Franklin caused very strong wind with wind speeds above 20 m/s and the effects on the beach were still clearly visible one day later (22 February).

October 2021 additional scan

On 1st October 2021 we went with two students involved in the CoastScan project to perform our monthly scan from the beach. The dune foot is not captured by the permanent laser scanner in Noordwijk, so we regularly go to the beach to scan the dunes from the other side. K. Echeverry Caro works on filling these gaps in the data and quantifying the differences that they cause for her Bachelor thesis.

Helicopter scanned

Part of the observed area in Noordwijk contains a helicopter platform in the dunes. Our research into data quality is making use of this platform as a reference surface (publication). During our research we found two helicopters that landed on the platform at two different occasions in September 2019 and in August 2020. Above the point clouds of the landed helicopters are shown colored according to elevation (left) and intensity (right).

Student project on counting people on the beach

For the course 3D surveying of civil and offshore infrastructure at TU Delft a group of students has worked on counting the people that are walking on the beach using our CoastScan data from Noordwijk. In their final report they present their method that is able to detect up to 90% of the people that are walking on the beach in an area of about 400 m length in front of the laser scanner.

Point cloud of the beach in Noordwijk with people detected by the algorithm marked in colors.

Master Project deals with visualizations of CoastScan data

In February 2021 Y. Schreijer successfully completed her master thesis with the title: ‘Visual insight into the temporal changes of sand patterns along the Dutch coast’ under the supervision of E. Verbree and P. van Oosterom (TU Delft) and P. Goessen (Hoogheemraadschap Hollands Noorderkwartier). For her master project she used CoastScan data to visualize dynamics that influence deformation processes of the coast.

The image shows elevation differences in Noordwijk after a storm hit the coast in early February 2020. A large sand deposition is circled in red.

In a comparison between two consecutive scans (about one hour apart) moving sand ripples, possibly caused by aeolian sand transport due to strong winds, are made visible.

Workshop on Error Sources and Correction in PLS

On 18 March 2021 we successfully held the first workshop on error sources and corrections in permanent laser scanning. With 28 participants from universities and companies in the Netherlands, Belgium, Germany, Finland, Austria and Switzerland, various research groups came together to share their experiences on data collection with permanently installed laser scanners. The focus on error sources and corrections as well as different applications were discussed in seven presentations. The workshop concluded with several ideas for future collaborations and the idea for a follow-up workshop. More details can be found here.

We want to thank all the speakers and participants for their contributions and we are looking forward to future collaborations.

FIG article of the month March 2021 using CoastScan data

The contribution of G. Deruyte, L. De Sloover, A. De Wulf and S. Vos to the FIG Working Week 2020 was named article of the month of the International Federation of Surveyors (FIG) for March 2021. The article presents a calibration method for the PLS data set of Oostend, Belgium.

G. Deruyte, L. De Sloover, J. Verbeurgt, A. De Wulf and S. Vos, “Macrotidal Beach Monitoring (Belgium) using Hypertemporal Terrestrial Lidar, ” FIG Working Week 2020, no. 10560, May 2020. Link.

New Publications

The last months have been productive for the different research groups that are using the CoastScan data in their work. The following publications give an idea of the latest results of research related to CoastScan. A complete list can be found under publications.

Jin et al. 2021: Monitoring spatiotemporal variations in beach surface moisture using a long-range terrestrial laser scanner

Anders et al. 2021: Fully automatic spatiotemporal segmentation of 3D LiDAR time series for the extraction of natural surface changes

Kuschnerus et al. 2021: Coastal change patterns from time series clustering of permanent laser scan data

Poppema et al. 2021: The effect of building geometry on the size of aeolian deposition patterns: scale model experiments at the beach

Vos et al. 2020: Cross-Shore Intertidal Bar Behavior along the Dutch Coast: Laser Measurements and Conceptual Model