Land and marine gravity surveys, grids, models, and geoids are listed below. Data parameters include latitude, longitude, observed gravity and elevation, Bouguer Gravity Anomaly (land), and Free-air Anomaly (ocean). Each dataset contains documentation, including source contributor.
Approximately 70 percent of the data are observed values--regional station data
collections (separated primarily by contributors) and absolute gravity measurements. Grids and other derived summary data sets represent another 30 percent of the data.
A standard format description for the land gravity data preserves fields unique to a specific data collection. Marine gravity data are stored in the MGD77 format. Standard terminology, as well as minimum / maximum values and histogram distributions for each parameter are available. Point distribution plots are .PCX and .GIF images.
