Helicopter electromagnetic and magnetic survey data and maps, northern Bexar County, Texas
Flight-line data release for a helicopter electromagnetic (HEM) and
magnetic geophysical survey flown in early December 2003, in
Northern Bexar County, Texas. The U.S. Geological Survey (USGS)
contracted the survey to Fugro Airborne of Toronto, Canada.
Data include coordinates in UTM zone 14 meters, longitude and …