"NCEI's Marine Trackline Geophysical database provides bathymetry (single-beam), magnetics, gravity and seismic reflection data collected during marine cruises from 1939 to the present. Data sources include US and non-US oceanographic institutions, universities, and government agencies with worldwide data coverage. Use the Trackline Geophysical Data Viewer to search by geographic area, year of survey, institution, platform, survey name, date added to the database, and data type. Downloads can be customized to area, data type, and format."--Agency website |