Abstract:
The Digital Bathymetric Data Base Variable resolution (DBDBV) is a digital bathymetric data base that provides ocean depths at various gridded resolutions. DBDBV was developed by NAVOCEANO to support the generation of bathymetric chart products, and to provide bathymetric data to be integrated with other geophysical and environmental parameters for ocean modeling. Grid resolutions available ... include 0.5, 1, 2, and 5 minutes of latitude/longitude (1 minute of latitude = 1 nautical mile or 1.852 km). For data coverage for each resolutions see Related URLs below.
The data base for DBDBV consists of four file types. The depth information is expressed in meters, uncorrected at an assumed sound velocity of 1500 meters per second. The first file is a Master Index File that contains a pointer or byte address to each populated one degree cell for each of the resolutions available. The second file is an Index File that provides a linkage to the detailed depth values, as well as, a linkage to a description file associated with the depths. The third file, or Description File, provides details on the compressions, scaling and storage of the depth information. The fourth file is the Data File that contains the depth values for a on degree cell of a specific resolution. The geographic coverage of the 5 minute gridded bathymetry of the current version of DBDBV includes all ocean areas and adjacent seas above 78 degrees South latitude to 90 degrees North latitude.
The geographic coverage of the 2 minute gridded bathymetry of the current version of DBDBV includes:
a. Mediterranean Sea including the Adriatic Sea and the Black Sea, b. Red Sea, c. Persian Gulf, d. Gulf of Aden west of 50 degrees East longitude, e. Gulf of Oman north of 23 degrees North latitude and west of 70 degrees East longitude, and f. an area encompassing the Bay of Biscay, Gulf of Cadiz and the Atlantic approaches to the Straits of Gibraltar bounded by 10 degrees West longitude, 30 degrees North latitude and 48 degrees North latitude.
The geographic coverage of the 1 minute gridded bathymetry of the current version of DBDBV includes:
a. Mediterranean Sea including the Adriatic Sea and the Black Sea, b. an area of the Baltic Sea bounded by 15 degrees East longitude, 25 degrees East longitude, 54 degrees North latitude and 60 degrees North latitude, c. the Atlantic approaches to the Straits of Gibralter bounded by 10 degrees West longitude, 35 degrees North latitude and 40 degrees North latitude, and d. an area of the eastern Pacific bounded by the west coasts of Mexico and the United States, 140 degrees West longitude, 29 degrees North latitude and 45 degrees North latitude.
The geographic extent of the 0.5 minute gridded bathymetry of the current version of DBDBV is selectively dispersed areas of the world.
Another source for this data is the National Oceanic and Atmospheric Administration's National Geophysical Data Center (NOAA/NGDC), as DBDBV is the bathymetry in ETOPO2, and is also contained in TerrainBase held at Bruce Gittings' Data Catalogue.
Description:
Data access to the Variable Resolution Gridded Bathymetry Database (DBDBV) through the U.S. Global Data Assimilation Experiment (GODAE). Data can be accessed through HTTP, FTP and Live Access Server.
