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Administrative Boundaries Centroids of National Park System Units 06/30/2022
National Park Service unit points. -
Administrative Boundaries Centroids of National Park System Units 06/30/2022
National Park Service unit points. -
Hydrographic and Impairment Statistics Database: WWII
(Note: 2/8/17, updated title and unit link to use the current unit code of WWII) Hydrographic and Impairment Statistics (HIS) is a National Park Service (NPS) Water Resources...