Folder
ROOT
_ScienceBase Catalog
__USGS Data Release Products
___Airborne Geophysical Surveys over the 2011 Mineral, Virginia, Earthquake Area
____Radiometric data
The grids provided are: "K_UTM18N_NAD83.gxf": Corrected potassium (%) "eU_UTM18N_NAD83.gxf": Corrected equivalent uranium (ppm) "eTh_UTM18N_NAD83.gxf": Corrected equivalent thorium (ppm) "Total_Count_UTM18N_NAD83.gxf": Total count (counts/sec) 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 grid 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 regarding data collection...
Line data are presented as comma separated values (csv) with the following definitions: LINE Flight line number DATE Year / Julian day TIME Time (UTM, 24-hour) hh:mm:ss LONG Longitude, WGS84 (degrees) LAT Latitude WGS84 (degrees) x_UTM18N Easting, UTM Zone 18N (meters) y_UTM18N Northing, UTM Zone 18N (meters) RALT Radar altimeter height (meters) LALT Laser altimeter height (meters) BARALT Barometric altimeter height (meters) MSL GPS elevation, final (orthometric MSL - NAVD88 using GEOID09) TEMP Temperature (Celsius) TOTAL Corrected total count (counts/second) CONC_K Corrected potasssium...
Images here include: TotCount_UTM18N_NAD83 (GeoTiff, KMZ): Total count TotCount_Contour250CPS_UTM18N_NAD83 (GeoTiff, KMZ): Total count with 250 counts/sec contours TotalCount_Colorbar.png provides a colorbar key for the total count images. Ternary_K_U_Th_UTM18N (GeoTiff, KMZ): Ternary image showing relative values of K, eU, and eTh. Ternary_Key.png provides a color key for the ternary image. Images may be geo-registered using embedded projection information in both the tiff and kmz files. Each image is projected using 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...
