Bathymetry of Lac Neuchâtel: Topo-bathymetric LiDAR and sonar data published online
The Swiss canton Neuchâtel published the combined LIDAR-sonar bathymetric dataset of Lac Neuchâtel online.
2D geoportal: https://sitn.ne.ch/s/g8g3X
https://sitn.ne.ch/s/Qi6rD
LiDAR geoportal: https://sitn.ne.ch/lidar/
The detailed background of the LiDAR data acquisition carried out in March 2020 by AHM, and the sonar survey by Swiss University of Bern are available here (in French):
https://sitn.ne.ch/web/plaquettes/plaquette_bathymetrie.pdf