[Parameters: Topic='OCEANS', Term='COASTAL PROCESSES', Variable_Level_1='ESTUARIES']
Estuarine Bathymetry for U.S. Estuaries from NOAA National Ocean Service (NOS)Entry ID: NOS_SPO_ESTUARINE_BATHY
Abstract: The National Ocean Service's (NOS) Estuarine Bathymetry is a digital raster compilation of NOS hydrographic survey data for selected U.S. estuaries.
The estuarine bathymetry data sets are available in both 30 meter and 3 arc second resolutions. The gridded bathymetry data are an interpolated data set representing the most up-to-date depth sounding information.
Seventy of the approximately 130 ... estuaries within the conterminous U.S. are available. Those estuaries which are not included were those that had less than 80% coverage of digital sounding data needed to support detailed bathymetric processing.
The source hydrographic surveys are soundings collected by NOS over the last 150 years (these data are housed in the national archives of the National Geophysical Data Center, Boulder, CO). Bathymetric elevations are referenced to the local tidal datum, typically Mean Lowest Low Water (MLLW) averaged over a 19 year tidal epoch.
The files are in DEM format and split into 7.5 minute (for 30m DEMs) or 1 degree (for 3 arc second DEMs) sections, corresponding to USGS quadrangles. For those interested in large portions of estuaries, or entire estuaries, "BIG", non standard, DEMs for each resolution are also provided.
[This information was obtained from the NOS Mapfinder Estuarine Bathymetry Product Description.]
(Click for Interactive Map)
Latitude Resolution: 30 m or 3 arc second
Longitude Resolution: 30 m or 3 arc second
Horizontal Resolution Range: 30 meters - < 100 meters
Use Constraints Although the bathymetric data are derived from the same original data sets as NOAA's Nautical Charts (i.e., NOS hydrographic surveys), these data have not been put through the same selection process that the nautical charting requires. Therefore, THIS DATA SHOULD NOT BE USED FOR NAVIGATION.
Distribution Media: WWW
Distribution Size: 22 KB - 21 MB, compressed
Distribution Format: DEM
Creation and Review Dates
Last DIF Revision Date: 2009-03-02