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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.

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Lisätietoja

Kenttä Arvo
Ylläpitäjä Steve Nechero
Viimeksi päivitetty joulukuu 17, 2019, 10:37 (AKST)
Luotu joulukuu 17, 2019, 10:37 (AKST)
Tila Complete
Start Date 1979-12-31