Made by US Geological Survey
USGS topographical contour negatives of the Portland area. Scale 1:24000. The following areas are available:
Amboy, Ariel, Astoria, Battle Ground, Camas, Cape Disappointment, Canby, Chinook, Colton, Damascus, Estacada, Gervais, Gladstone, Grande Ronde, Knappton, Lacamas Creek, Midway, Mollala, Mt Tabor, Newberg, Niagara Creek, Ocean Park, Orchards, Oregon City, Redland, Sandy, Scotts Mills, Sherwood, Silverton, St Helens, St Paul, Stony Mountain, Trask Mtn, Warrenton, Washougal, Wilholt, Woodburn and Yacolt.
Dimensions: 24″W | 29.5″H