data api · Global

National Hydrology Dataset Plus High Resolution (NHDPlus HR)

A geospatial dataset depicting the flow of water across the Nation's landscapes and through the stream network. The NHDPlus HR was built using the National Hydrography Dataset High Resolution data at 1:24,000 scale or more detailed, the 10 meter 3D Elevation Program data, and the nationally complete Watershed Boundary Dataset.

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What's in it

Data offered docs-verified: flow of water across the landscape · stream network
Coverage llm-inferred: United States (inferred from 'Nation' wording, USGS tag, and NHD/3DEP inputs)
Resolution docs-verified: 1:24,000 scale or more detailed (source hydrography); 10 m 3DEP elevation input
Formats docs-verified: GDB (file geodatabase, .gdb) · XML metadata (.xml)
Access docs-verified: Public visibility on Source Cooperative, no login indicated; licence not stated in DOCS

Useful for

Use cases llm-inferred: Stream-network and watershed boundary reference for non-UK international project sites · Flow-path and drainage-routing analysis from 10 m elevation for preliminary US site work · Prototyping hydrological network workflows in GIS before applying UK-specific data
Audience llm-inferred: hydrologists · GIS analysts · drainage engineers · flood consultants (US projects only)

Limitations

Constraints llm-inferred: Appears to cover the United States only; no UK coverage, so of limited use for UK-focused projects · Catalogue region is listed as 'Global', which conflicts with the national (US) scope described in DOCS · No time span or update cadence stated; DOCS show only a last-updated date of 21 Aug 2025 · Licence not stated in DOCS; catalogue points to a product README not included in the provided docs · Distributed as a file geodatabase (.gdb), so it needs GDAL/ESRI-capable tooling to read

Licence: see product README
Authentication: Public; anonymous HTTPS/S3 access via data.source.coop
GitHub stars: Unknown
Last commit: Unknown
Last successful page check: 14/10/2026
Page health: page reachable
Package: Not recorded
Verification: Not independently verified

Provenance & evidence

Verified via Source Cooperative API /api/v1/products/avikertesz (public product, updated 2025-08-21).

Metadata observed 14/10/2026 · research sweep: manual-2026-10-15 (source.coop)