1. Home
  2. Datasets
  3. 12 Digit Watershed...

12 Digit Watershed Boundary Data 1:24,000 for Southeast Alaska

This data set is a complete digital hydrologic unit boundary layer to the Subwatershed (12-digit) 6th level for the entire United States. This data set consists of geo-referenced digital data and associated attributes created in accordance with the "Federal Guidelines, Requirements, and Procedures for the National Watershed Boundary Dataset; Chapter 3 of Section A, Federal Standards, Book 11, Collection and Delineation of Spatial Data; Techniques and Methods 11-A3" (04/01/2009). http://www.ncgc.nrcs.usda.gov/products/datasets/watershed/index.html . Polygons are attributed with hydrologic unit codes for 4th level sub-basins, 5th level watersheds, 6th level subwatersheds, name, size, downstream hydrologic unit, type of watershed, non-contributing areas and flow modification.

Data and Resources

Additional Info

Field Value
Maintainer Steve Nechero
Last Updated December 17, 2019, 10:37 (AKST)
Created December 17, 2019, 10:37 (AKST)
Status Complete
Start Date 1979-12-31