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This data set is a complete digital hydrologic unit boundary layer to the Subwatershed (12-digit) 6th level for the Illinois Valley Landscape Assessment. 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...
Tags: basin,
boundaries,
huc,
huc12,
hydrologic unit code, All tags...
hydrologic units,
region,
sub-basin,
sub-region,
subwatershed,
watershed,
watershed boundaries,
watershed boundary dataset,
wbd, Fewer tags
This Illinois Valley Landscape Assessment boundary was developed by selecting 12-digit subwatersheds that encompass the agreed upon assessment boundary. These subwatersheds were dissolved into a single boundary. Below is the description of the source data: 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...
Tags: basin,
boundaries,
huc,
huc12,
hydrologic unit code, All tags...
hydrologic units,
illinois valley,
landscape assessment,
region,
sub-basin,
sub-region,
subwatershed,
watershed,
watershed boundaries,
watershed boundary dataset,
wbd, Fewer tags
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