Watersheds 2-Digit HUC (USGS 2022)
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资源简介：
This EPA content item depicts regional watershed boundaries, specifically 2-digit hydrologic units (HUs), for the United States, Puerto Rico, and the U.S. Virgin Islands as developed by USGS, USDA-NRCS, and partner organizations.
创建时间：
2021-08-17
