Flowline - Small Scale (HI, PR, VI, Pacific Territories)

The National Hydrography Dataset (NHD) is a feature-based database that interconnects and uniquely identifies the stream segments or reaches that make up the nation's surface water drainage system.

Oregon Open Data Portal2024-01-18 更新30

HIFLD OPEN Flowline - Small Scale (HI, PR, VI, Pacific Territories)

The USGS National Hydrography Dataset (NHD) service from The National Map is a comprehensive set of digital spatial data that encodes information about naturally occurring and constructed bodies of su

ICPSR2025-01-01 更新00

Area - Small Scale (HI, PR, VI, Pacific Territories)

The National Hydrography Dataset (NHD) is a feature-based database that interconnects and uniquely identifies the stream segments or reaches that make up the nation's surface water drainage system.

Oregon Open Data Portal2024-01-18 更新40