Grid files (Grid eXchange Format)

The grids provided here are: "FAA_1000_UTM18N_NAD83.gxf" : Gravitational Free-air anomaly (mGal) with a 1-km half-wavelength grid filter "BA_267_1000_UTM18N_NAD83.gxf": the Bouguer anomaly (mGal) derived from the above free-air anomaly assuming a reference density of 2.67 g/m3. Grids are in the ASCII grid exchange format (.gxf). Header information provides the grid dimensions, separation, coordinates and map projection, and z-value range information. The grid values follow. The projected coordinate system used for all grids is UTM Zone 18N: Datum: NAD83 Base Latitude: 0.00 degrees Central Meridian: -75.00 degrees False Easting: 500,000 meters False Northing: 0 meters Scale factor at natural origin: 0.9996 Detailed information [...]