The Historic Oregon Topographic Maps consist of superceded or obsolete topographic maps published by the U.S. Geological Survey. The maps cover all of Oregon and are available in a variety of scales, from 1:24,000 to 1:250,000.
The Wetlands Inventory and Survey Maps document the National Wetlands Inventory as conducted in the western United States and the central Willamette Valley and Pacific Coast in Oregon by the U.S. Fish and Wildlife Service, Office of Biological Services. The collection includes an atlas of state and local wetlands surveys that had been conducted in 1965-1975 as well as drafts of wetlands inventory maps documenting the type and extent of coastal and inland wetlands in Oregon.
The Willamette Valley Sketch Map depicts purchases and reservations made by the Board of Commissioners with Native Americans in Oregon. The map was prepared by George Gibbs and Edmond A. Starling. Gibbs was a geologist and ethnologist who participated in treaty negotiations between the U.S. Government and native tribes. This collection consists of three reproductions of the original map, which is held in the National Archives.