In recognition of World Hydrography Day, June 21, the Ocean Basemap map service was recently updated to include bathymetric data from the University of New Hampshire Center for Coast and Ocean Mapping/Joint Hydrographic Center (UNH CCOM/JHC) and from the Davey Jones’ Locker Seafloor Mapping/Marine GIS Lab at Oregon State University (OSU) for a number of areas in both the Pacific and Atlantic.
New, more detailed bathymetry contributed by UNH CCOM/JHC can be found at scales 1:2.3M–1:577k in the following areas: Mariana Trench, Bowers Ridge, Beringian Margin, Necker Ridge, Line Islands, Gulf of Alaska, Mendocino Ridge, Sigsbee Escarpment, Florida Escarpment, and off the Eastern seaboard in the Atlantic. In addition, more detailed bathymetry contributed by OSU over American Samoa can also be found at scales 1:2.3M–1:577k.
The contribution made by UNH CCOM/JHC consists of multibeam bathymetry initially collected to support an extended continental shelf as part of the United Nations Law of the Sea project. OSU’s contribution comprises deepwater bathymetry for the entire Eastern Samoan region and was gathered in original support of the Fagatele Bay National Marine Sanctuary, American Samoa, and the NOAA Pacific Islands Benthic Habitat Mapping Center. Participation from both UNH and OSU in Esri’s Community Maps Program mark an exciting leap forward for marine GIS users of the Ocean Basemap.
Contribution regions for The University of New Hampshire (red) and Oregon State University (gold)
New, greatly-detailed bathymetry for the Mariana Trench, one such area updated with a contribution made by The University of New Hampshire’s Center for Coastal and Marine Mapping/Joint Hydrographic Center
Higher resolution bathymetry contributed by Oregon State University’s Davey Jones’ Locker Seafloor Mapping/Marine GIS Lab for the seafloor surrounding the island of American Samoa in the South Pacific
Other updated areas to explore:
The Ocean Basemap map service was also updated to include expanded coverage at scales 1:36,000, 1:18,000, and 1:9,000. In addition to existing large scale areas highlighted in our previous blog post, the Ocean Basemap now includes coverage over a large portion off the coast of both Northern and Southern California.
Very high resolution data now exists in Northern California for Half Moon Bay, Golden Gate and East San Francisco Bay, and from Point Reyes north along the coast to Point Arena. Similarly detailed bathymetry can now also be found in Southern California for La Jolla Canyon, off the coast of Dana Point, along the eastern coast of Santa Catalina Island, and in areas between Palos Verdes Point and Point Dume. This bathymetric data is from NOAA’s National Geophysical Data Center (NGDC).
New area of detail off the coast of Northern California included from scales 1:36k–1:9k
High resolution bathymetric data from NOAA’s National Geophysical Data Center off the north coast of San Francisco
New area of detail off the coast of Southern California included from scales 1:36k–1:9k
High resolution bathymetric data from NOAA’s National Geophysical Data Center along the east coast of Santa Catalina Island in Southern California
If you have previously used the Ocean Basemap, you may need to clear your cache in order to see the updates.
If you have questions or feedback, please post them in the ArcGIS Online forums.