DS926 Digital surfaces and thicknesses of selected hydrogeologic units of the Floridan aquifer system in Florida and parts of Georgia, Alabama, and South Carolina -- Streams represented in study area

These data were released prior to the October 1, 2016 effective date for the USGS’s policy dictating the review, approval, and release of scientific data as referenced in USGS Survey Manual Chapter 502.8 Fundamental Science Practices: Review and Approval of Scientific Data for Release. 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 map layer shows areal and linear water features of Florida, Georgia, South Carolina, and Alabama. The original file was produced by joining the individual State hydrography layers from the 1:2,000,000- scale Digital Line Graph [...]

本数据集发布于美国地质调查局（United States Geological Survey, 简称USGS）科学数据审查、核准与发布政策的生效日期——2016年10月1日之前，相关政策要求详见《美国地质调查局调查手册第502.8章：基础科学实践——科学数据发布的审查与批准》。
作为美国地质调查局地下水资源项目的组成部分，本次研究构建了佛罗里达含水层系统（Floridan aquifer system）中选定水文地质单元的数字化地表形态与厚度数据，用以搭建更新后的水文地质框架。
本地图图层展示了佛罗里达州、佐治亚州、南卡罗来纳州与阿拉巴马州境内的面状与线状水体要素。
原始文件通过整合1:200万比例尺数字线划图（Digital Line Graph, DLG）中各州独立的水文图层拼接而成[...]