https://www.data.gov.uk/dataset/f5d0a7ca-608c-419b-8d61-a67e3a5749f1/maritime-and-coastguard-agency-mca-bathymetric-survey-hi1522-thames-routine-resurvey-20-10-2016
Maritime and Coastguard Agency (MCA) Bathymetric Survey HI1522, Thames Routine Resurvey 2016,...
bathymetric survey