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Master Project deals with visualizations of CoastScan data

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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

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  • A. De Wulf
  • G. Kerekes
  • D. Schröder
  • A. Voordendag

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

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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

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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

Observation deck paved

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  • wooden deck before
  • paved deck since Feb 2021

The observation deck in the dunes in Noordwijk is located to the north of our laser scanner and just within the field of view. At our monthly round, where we check on the location, take some extra scans of the dune foot and collect GPS measurements of the beach, we also measure the GPS coordinates of this observation deck. Until the beginning of this year the deck was made of wood. Now, since February 2021 the deck is paved with bricks. This will increase the stability as a reference in our point clouds. But of course, this change does not allow for comparison with the data of the deck before it was paved.

Laser Scanner moved 2 m North

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On 2nd December 2020, the laser scanner was moved from its permanent position on the balcony of hotel Huis ter Duin in Noordwijk to a new fixed position on the same balcony, but about 2 m to the North of the previous position. The move was requested by the hotel. We are now working on methods to provide a fixed transformation that can be applied to the data to remove the resulting shift.

Break in PLS record for maintenance

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From 25 June 2020 to 30 July 2020 there is a break in the data recorded with our permanent laser scanner. In this period the scanner was removed for maintenance activities. It was placed back on July 30th at the exact same location and is fully operational again since then.

CoastScan data set from Kijkduin published

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Point cloud of the beach in Kijkduin taken with our RieglVZ-2000 laser scanner. Colors indicate height, from yellow (0 m close to the water line) to grey (14 m and higher, on top of the dunes and behind them).

Part of our data set from Kijkduin, covering daily scans in January 2017 has been published via 4TU Research Centre: CoastScan: Data of daily scans at low tide Kijkduin January 2017 and can now be accessed online.

Part of fieldwork extended to end of April

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Part of our measurements in Noordwijk for the ScanEx fieldwork campaign are ongoing. Thanks to the restrictions of the use of public beaches because of the Corona virus outbreak, the two shipping containers could remain on the beach until the end of April. The weekly scans with our mobile laser scanner around the containers are continuing, as well as some of the measurements of wave data with pressure sensors. We also continue the collection of meteorological data next to the laser scanner (after a short break at the end of March).