미국
DS926 Digital surfaces and thicknesses of selected hydrogeologic units of the Floridan aquifer system in Florida and parts of Georgia, Alabama, and South Carolina -- Extent of the Biscayne aquifer of the surficial aquifer system
Digital surfaces and thicknesses of selected hydrogeologic units of the Floridan aquifer system were developed to define an updated hydrogeologic framework as part of the U.S. Geological Survey Groundwater Resources Program. This dataset contains a polygon showing the extent of the Biscayne aquifer of the surficial aquifer system. This layer was extracted from the Aquifers map layer located at http://nationalatlas.gov/