Relief shown by shading and spot heights.; Public land grid.; Longitude west of Greenwich noted across upper margin; longitude west of Washington, D.C. noted across lower margin.; Inset: City of Portland.; Shows Indian and military reservations; national forests, parks, monuments, and bird refuges; U.S. reclamation projects; light houses and military roads. 72 x 92 centimeters Scale [1:760,320] 1 inch = 12 miles General Map Collection