NOAA point soundings NOAA main bathymetry site USGS Bathymetry Portal Global Multi-Resolution Topography Data Portal
DEMs on land
MICRODEM requires that depths have negative z values. You can quickly edit the DEM to multiply the depths by -1.
| Spacing | Data series | Coverage | Provider | Web Source | Notes |
| 1' | ETOPO1 | NOAA | GEODAS build a grid (use ASCII XYZ) Older versions had 5' and 1' resolution |
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| Global Multi-Resolution Topography Data Portal (includes RIDGE data) | MGDS | ||||
| Seamount database | Scripps | GMT format | |||
| USGS Coastal mapping (includes lakes) | USGS | Crater Lake, Lake Tahoe, San Francisco, Los Angeles, San Diego, Hawaii, Gulf of Mexico--not all may be supported in MICRODEM | |||
| 3" to 10' | NOAA Design a Grid | NOAA info | US coastal and Great Lakes
GEODAS build a grid (use ASCII XYZ for export). If you use the G98 format, expect to have to edit the coordinates of the SW corner. |
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| NOAA Multibeam Viewer and Data Downloader | NOAA | ||||
| 15" | GEBCO_2022 and earlier Grids | https://www.gebco.net/data_and_products/gridded_bathymetry_data/ | |||
| 15" | SRTM15_PLUS | Entire world, including ocean basins |
https://catalog.data.gov/dataset/srtm15-plus-data-fusion-of-shuttle-radar-topography-mission-srtm-land-topography-with-measured- https://topex.ucsd.edu/marine_topo/mar_topo.html |
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| 15" and 250 m | NOAA EEZ | US coastlines out to 200 nm | NOAA | NOAA description | EEZ data is old; may have to purchase on CD |
| 1' Geographic 250 m Polar stereographic |
International Bathymetric Chart of the Arctic Ocean (IBCAO) | Arctic Ocean | NOAA | Current version requires some modification to use | |
| 15" and 30" | Land/sea merge | Gulf of Maine | USGS | USGS | Arc, GMT, Matlab and ASCII formats. |
| 3.75" | European waters, EMODNET 2018 |
EMODnet-bathymetry emodnet-hydrography |
Get the Arc ASCII. The 16 bit Geotiff is a colored image,
and the 32 bit Geotiff has issues.
Includes Black Sea, Med, North Atlantic, some Arctic. 2016 version had 7.5" resolution |
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| 100 m | EEZ grids | Alaska, East Coast | UNH | UNH | Get the ASCII format. |
| 3" | Land/sea merge | Coastal US Great Lakes Bathymetry |
NOAA | NOAA info | Available on CD
($).
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| 30 m | US Coastal Estuaries | Selected estuaries, underwater only | NOAA | NOAA | Includes Hudson River, Chesapeake Bay. Get USGS ASCII format for MICRODEM |
| USGS California | http://walrus.wr.usgs.gov/mapping/csmp/gis.html | ||||
| 40 feet | Gulf of Mexico | https://www.boem.gov/Gulf-of-Mexico-Deepwater-Bathymetry/ | |||
| 1 m | SHOALS LIDAR | Hawaii | USACE | USACE | Random XYZ points |
| NOAA soundings | NOAA soundings |
| Academic Web Sites | Notes on Multibeam Available |
| http://science.whoi.edu/ahanemo2/ | AHA-NEMO2, Shipboard data web site compiled during R/V Melville NEMO Expedition, Leg 2, D. Fornari, M. Perfit, M. Tolstoy, R. Haymon, D. Scheirer, P. Johnson, G. Kurras, S. White, J. Getsiv, and shipboard scientific and technical party, May, 2000 |
Hawaii: http://www.soest.hawaii.edu/HMRG/Multibeam/index.php |
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http://www.mbari.org/data/mapping/mapping.htm |
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| http://dusk.geo.orst.edu/tonga/mgr/ | DeepSeaDawn data |
| http://seafloor.csumb.edu/SFMLwebDATA.htm | |
| http://www.ngdc.noaa.gov/mgg/inundation/ | Tsunami grids |
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http://www.ga.gov.au/scientific-topics/marine/bathymetry#
MH370 bathymetry and backscatter: http://marine.ga.gov.au/#/ |
Australia |
Marine geology and geophysics http://www.ngdc.noaa.gov/mgg/mggd.html
ChesBay seds http://www.mgs.md.gov/coastal/data/baysedata.html
Topobathymetric Model for Chesapeake Bay Region - District of Columbia, States of Delaware, Maryland, Pennsylvania, and Virginia, 1859 to 2015 is on the NOAA Coastal website https://coast.noaa.gov/dataviewer/#/
Other data
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.:
https://doi.pangaea.de/10.1594/PANGAEA.924451?format=html#download has data from fracture zones used in a paper in Nature (Grevemeyer, Ingo; Rüpke, Lars H; Morgan, Jason Phipps; Iyer, Karthik; Devey, Colin W (2021): Extensional tectonics and two-stage crustal accretion at oceanic transform faults. Nature, 591(7850), 402-407, https://doi.org/10.1038/s41586-021-03278-9 ). At least for the Atlantis fracture zone, the Global Multi-Resolution Topography Data is much better).
Last revision 3/18/2021