Map Credits (general)
Major roads from Oregon Department of Transportation.
Non-state roads from Oregon Department of Transportation and Census T2009 TIGER files.
Local roads from US Bureau of the Census, 2009 TIGER Files.
Railways from US Bureau of Transportation Statistics.
Airfields from US Bureau of Transportation Statistics.
Large scale stream data from United States Geologic Survey and the National Hydrologic Database High, 2006-2011.
Small scale stream data from Environmental Protection Agency and the National Hydrologic Database Plus, 2006-2010.
Lake shoreline polygons from United States Geologic Survey and National Hydrologic Database High, 2006-2011.
Political boundaries from US Bureau of the Census, mapping for 2010 Census.
Lake watersheds from delineation of ten meter DEMs and from National Hydrologic Database Plus catchments and the Watershed Boundary Database.
Shaded relief derived from ten meter DEM.
Land cover type from National Land Cover Database (NLCD) 2006.
Oregon public land ownership from US Bureau of Land Management from Oregon GEO as well as from Oregon State Parks.
Public land ownership outside Oregon from various state and federal sources.
Map Credits (bathymetric)
1985 Atlas of Oregon Lakes
Portland State University Center for Lakes and Reservoirs
National Agricultural Inventory Program
Oregon Department of Fish and Wildlife
Portland State University
US Soil and Conservation Service
US Geological Survey
US Army Corps of Engineers
US Bureau of Reclamation
US Forest Service