Dataset Groups Activity Stream Single beam survey data consisting of the two seafloor parameters roughness and hardness were obtained with the acoustic ground discrimination system RoxAnn off Helgoland in 2011 BibTex: @dataset{Mielck_Finn_and_Bartsch_Inka_and_Hass_H_Christian_and_Wölfl_Anne-Cathrin_and_Bürk_Dietmar_and_Betzler_Christian_2014, author = {Mielck, Finn and Bartsch, Inka and Hass, H Christian and Wölfl, Anne-Cathrin and Bürk, Dietmar and Betzler, Christian}, doi = {10.1594/PANGAEA.831686}, institution = {PANGAEA (Biosphere)}, title = {Single beam survey data consisting of the two seafloor parameters roughness and hardness were obtained with the acoustic ground discrimination system RoxAnn off Helgoland in 2011}, url = {https://service.tib.eu/ldmservice/vdataset/png-doi-10-1594-pangaea-831686}, year = {2014} }