Ocean Basemap

Map Service Name: Ocean_Basemap

Description: This map is designed to be used as a basemap by marine GIS professionals and as a reference map by anyone interested in ocean data. The basemap includes bathymetry, marine water body names, undersea feature names, and derived depth values in meters. Land features include administrative boundaries, cities, inland waters, and roads overlaid on land cover and shaded relief imagery.

The map was compiled from a variety of best available sources from several data providers, including General Bathymetric Chart of the Oceans GEBCO_08 Grid and IHO-IOC GEBCO Gazetteer of Undersea Feature Names, August 2010 version (http://www.gebco.net); National Oceanic and Atmospheric Administration (NOAA); Canadian Hydrographic Service (CHS); Seafloor Mapping Lab (SFML) of California State University Monterey Bay; National Geographic; DeLorme; NAVTEQ; and Esri. The basemap was designed and developed by Esri.

The Ocean Basemap provides coverage for the world down to a scale of ~1:577k, coverage for United States waters down to ~1:72k, and coverage down to ~1:9k in limited areas of United States waters.

Note:

Data from the GEBCO_08 grid shall not to be used for navigation or for any other purpose relating to safety at sea. The GEBCO_08 Grid is largely based on a database of ship-track soundings with interpolation between soundings guided by satellite-derived gravity data. In some areas, data from existing grids is included. The GEBCO_08 Grid does not contain detailed information in shallower water areas. Information concerning the generation of the grid can be found on GEBCO's website at http://www.gebco.net/data_and_products/gridded_bathymetry_data/. The GEBCO_08 Grid is accompanied by a Source Identifier (SID) Grid that indicates which cells in the GEBCO_08 Grid are based on soundings or existing grids and which have been interpolated. The latest version of both grids and accompanying documentation are available to download, on behalf of GEBCO, from the British Oceanographic Data Centre (BODC) at https://www.bodc.ac.uk/data/online_delivery/gebco/.

The names of the IHO (International Hydrographic Organization), IOC (Intergovernmental Oceanographic Commission), GEBCO (General Bathymetric Chart of the Oceans), NERC (Natural Environment Research Council), or BODC may not be used in any way to imply, directly or otherwise, endorsement or support of either the licensee or their mapping system.

Attribution: Sources: Esri, GEBCO, NOAA, CHS, CSUMB, National Geographic, DeLorme, and NAVTEQ

Coordinate System: Web Mercator Auxiliary Sphere (WKID 102100)

Tiling Scheme: Web Mercator Auxiliary Sphere

Map Service Data Format: Map server cache in JPEG format

Data Collection Details:

	World Premier Collection	North America Collection	Europe Collection	World Small-Scale Collection
Largest scale	~1:9k	~1:9k	~1:577k	~1:577k
Map service size on disk	13.5 GB	13.5 GB	Not Available	Not Available
Number of files	851	851	Not Available	Not Available