Directory Title: Alaska Gravity Data per 2 x 4 min Cell (96)
Principal Investigator: Dr. Dennis G. Milbert
Contributing Organization: NOAA, National Geodetic Survey, N/NGS5
                           1315 East-West Highway, Room 9349
                           Silver Spring, MD 20910-3282
                           dennis@ngs.noaa.gov

Summary:  This 2' x 4' gravity density grid for Alaska displays the 
distribution of about 1.1 million terrestrial and marine gravity 
data held in the National Geodetic Survey gravity data base in July 
1996. These data were augmented by gravity data contributions from 
NIMA (former Defense Mapping Agency) and by satellite 
altimeter-derived marine gravity anomalies computed by Sandwell and 
Smith (1996). The values show the number of gravity data contained 
in a given 2' x 4' cell.  Additional information is available at
   http://www.ngs.noaa.gov/GEOID/geoid.html
We are particularly grateful to NIMA for their assistance and their 
data contributions.