Water Body Location and Classification
To better map the locations of hydrographic features with Network parks, the Inventory and Monitoring Program and the Water Resources Division have been partnering with the U.S. Geological Survey, states, and other federal agencies to create the high-resolution National Hydrography Dataset 8-digit hydrologic units/subbasins containing national park sites. Available data can be accessedhere.
| Park | National Hydrography Datasets (ftp) |
| Assateague Island NS | High-resolution NHD Data |
| Cape Cod NS | High-resolution NHD Data |
| Colonial NHP | High-resolution NHD Data |
| Fire Island NS | High-resolution NHD Data |
| Gateway NRA | High-resolution NHD Data |
| George Washington Birthplace NM | High-resolution NHD Data |
| Sagamore Hill NHS | High-resolution NHD Data |
| Thomas Stone NHS | High-resolution NHD Data |
