Digital data set describing principal aquifers in the conterminous US
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资源简介：
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. This digital data set describes productive aquifers in the conterminous United States. The data set was generated from a U.S. Geological Survey 1:7,500,000-scale map of productive aquifers of the conterminous United States.
创建时间：
2023-01-01
