Most counties located entirely or partially within the district are available.
Polk and Okeechobee counties are not available. In counties that only partially include the District, the data is clipped to major surface water basin boundaries that extend beyond the District boundary. The photography dates are primarily October 1972 through January 1973, but there is also some dated December 1974. A specific spatial index for the various dates is not available. The digital data did not match exactly with the original maps.