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This watershed boundary feature class has been assembled to support agricultural conservation planning. The original data used to create this database are the Watershed Boundary Dataset (WBD) for the three individual states. The majority of the metadata found herein pertains to the Watershed Boundary Dataset (WBD) and has been modified only to reflect the repurposing of the data in its aggregated form.
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.
Inventory of various physical and administrative data related to the roadway networks that are either maintained by or are of special interest to the Ohio Department of Transportation, maintained by the Transportation Information Management Section of the Office of Technical Services, and considered the State’s “official” source for certified mileage, lane miles, Federal Aid eligibility, and HPMS. Update frequency: Annual. For more information, visit: www.dot.state.oh.us/Divisions/Planning/TechServ/Pages/RoadwayInformationManual.aspx