| unit | term | Number of features | Area (m2) | LANDSAT cells (30 m2) | MODIS cells (500 m2) | Area (km2) |
|---|---|---|---|---|---|---|
| HUC 2 | Regions | 22 | 498880342457 | 16629344749 | 997760684.9 | 498880342.5 |
| HUC 6 | Basins | 404 | 27058155607 | 901938520 | 54116311.2 | 27058155.6 |
| HUC 8 | Subbasins | 2400 | 4554789527 | 151826318 | 9109579.1 | 4554789.5 |
| HUC 12 | Subwatersheds | 102992 | 106139262 | 3537975 | 212278.5 | 106139.3 |
NHD - National Hydrography Dataset (legacy)
Water
Thematic
Legacy reference hydrofabric definitions and products from the National Hydrography Dataset
Back to Data Sources
Vector Processing Units (VPU) are the overarching domains used to break the north american continent into smaller, more standardized hydrologic units over which processing is a bit more tractable.
QuickFacts: summary statistics
These distinctions can be a little arbitrary1, let’s put some more context around these scale units.
References:
- Splash image from https://www.usgs.gov/media/images/nhdplus-hr-status-map-0 / https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/media/images/NHDPlusHRStatus_Web_20220707_0.png
Footnotes
I’m an American, I need these values in football fields please↩︎