Smith and Sandwell Global Seafloor Topography from Satellite Altimetry and Ship Depth Soundings (NOAA and Scripps Institution of Oceanography)

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Abstract: These data, available in poster and digital form, display measured and
estimated seafloor topography. This new estimate of seafloor
topography was obtained from shipboard depth soundings combined with
gravity data derived from satellite altimetry to produce a gridded
representation of seafloor topography for all ice-free ocean areas
within +/-72 degrees latitude. The depth data were obtained by
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Caption:  Measured and Estimated Seafloor Topography
Description:  Walter H.F. Smith and David T. Sandwell, Seafloor Topography Version
4.0, SIO, September 26, 1996, Copyright 1996.

Geographic Coverage
Spatial coordinates   
  N: 72.0   S: -72.0   E: 180.0   W: -180.0

Data Set Citation
Dataset Originator/Creator: Smith, W., and Sandwell, D.
Dataset Title: Measured and Estimated Seafloor Topography
Dataset Publisher: World Data Center-A for Marine Geology and Geophysics
Issue Identification: Research Publication RP-1
Data Presentation Form: map poster
Online Resource:
Data Resolution
Latitude Resolution: 2 minute grid
Longitude Resolution: 2 minute grid
ISO Topic Category
Use Constraints Copyright 1997
Walter H. F. Smith and David T. Sandwell

Please copy and use the digital topography files for your
applications. We are not responsible for errors in the depths. The
depths have limited accuracy and should not be used for navigation.

The data contained in the digital files should not be used
in any product sold for profit without ... View entire text
Ancillary Keywords
Originating Center
Data Center
Geosciences Research Division, Scripps Institution of Oceanography Supplemental Info
Data Center URL:

Data Center Personnel
Contact Address:
University of California at San Diego
Geological Data Center-0223
9500 Gilman Drive
City: La Jolla
Province or State: CA
Postal Code: 90293-0223
Country: USA
Distribution Media: HTTP, FTP, LAS, DODS
Distribution Format: COARDS NetCDF
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Email: gsfc-gcmduso at
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Smith, W. H. F. and D. T. Sandwell, 1997, Global Seafloor Topography
from Satellite Altimetry and Ship Depth Soundings, Science 277:
Extended Metadata Properties
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Creation and Review Dates
Last DIF Revision Date: 2006-12-18
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