St. Johns River, FL (S180) Bathymetric Digital Elevation Model (30 meter resolution) Derived From Source Hydrographic Survey Soundings Collected by NOAA
Bathymetry for the St. Johns River was derived from thirty-two surveys containing 158,931 soundings. No surveys were omitted. The average separation between soundings was 66 meters. Twenty-nine of the thirty-three surveys dated from 1935 to 1939. The remaining surveys, located in the north, dated from 1958 or 1959. …