1:2,000,000-scale Digital Line Graph files of streams
收藏U.S. Geological Survey2023-01-01 更新2026-04-23 收录
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https://www.sciencebase.gov/catalog/item/631405c4d34e36012efa317b
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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 is a 1:2,000,000 coverage of streams for the conterminous United States.
提供机构：
U.S. Geological Survey
创建时间：
2023-01-01
