Description: 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 1st(Region), 2nd(Sub-Region), 3rd(Basin), and 4th(Sub-Basin) Hydrologic Unit Level codes, names, Sub-Basin acres and square miles. This data set was obtained from the source in July 2012.
Copyright Text: Funding and support for the Watershed Boundary Dataset (WBD) were provided by the Natural Resources Conservation Service, the Environmental Protection Agency, and the United States Geological Survey. Representatives from the U.S. Geological Survey and Environmental Protection Agency contributed a substantial amount of time and salary towards quality review and updating of the dataset in order to meet the Federal Standards for Delineation of Hydrologic Unit Boundaries.
Description: Existing Forest Service roads with attributes representing their characteristics. Each feature represents a segment of road where the attributes are the same. These attributes are generated from the II_ROAD_CORE_ATM table. This table contains nationally required descriptive attribute data that is stored within an Oracle database. Attributes apply either to the entire road or to some measured distance along the road. Only NFSR roads have been edge-matched. Some public roads may be duplicated, especially near boundaries of adjacent National Forests. Non Forest Service roads are entered at the discretion of each National Forest.
Description: A route system depicting all roads within or in close proximity to an administrative unit with resource access values and risk ratings for the following resource areas: botany, aquatics, recreation, timber, heritage. The Willamette National Forest RoadEvent layer was dissolved on the following attribute fields: Operational Maintenance Level and Surface Type. The road network was subsequently processed to create segments between all road junctions. In some instances, a road segment may extend beyond a junction if a surface type change or maitenance change occurs. A rigorous analysis process was completed to calculate access values and risks associated with each road segment. A final long term recomendation was calculated and assigned to each road segment.