World Ocean Base

Ocean Base map

Map Service Name: World_Ocean_Base

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 focuses on bathymetry. It also includes 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 version 20100927 and IHO-IOC GEBCO Gazetteer of Undersea Feature Names August 2010 version (, National Oceanic and Atmospheric Administration (NOAA), and National Geographic for the oceans; and DeLorme, HERE, and Esri for topographic content. The basemap was designed and developed by Esri.

For details on data sources in this map service, view World Ocean Base Contributors (PDF).

The Ocean Base map currently provides coverage for the world down to a scale of ~1:577k; coverage down to ~1:72k in United States coastal areas and various other areas; and coverage down to ~1:9k in limited regional areas.

Attribution: Sources include Esri, GEBCO, NOAA, National Geographic, DeLorme, HERE, and other contributors

Coordinate System: Web Mercator Auxiliary Sphere (WKID 102100)

Tiling Scheme: Web Mercator Auxiliary Sphere

Map Service Data Format: Map server cache in JPEG format