Historic Oregon Topographic Maps, 1898-1993

Series I consists of topographic maps prepared by the U.S. Geological Survey in conjunction with the State of Oregon [State Engineers John H. Lewis (for 1908-1916 maps) and Percy A. Cupper (for 1922 map)] based on surveying done from about 1908 to 1914 at a scale of 1:31,680.

Series II consists of superceded 15 minute quadrangle maps at a scale of 1:62,500. Most were issued in the 1940s and 1950s. Some of the older sheets are encapsulated. The maps are arranged alphabetically by quadrangle name.

Series III comprises more than half the maps in this collection and consists of superceded 7.5 minute quadrangle maps at a scale of 1:24,000. This series includes some orthophotographs. Some of the maps are provisional editions; others are photo revised. Most of the maps were issued in the 1950s through 1970s. The maps are arranged alphabetically by quadrangle name.

Series IV consists of 1:250,000 scale maps that cover large areas of the state. Some of the maps have shaded relief; others show vegetation cover. In addition to topography, the maps depict roads, towns and cities, vegetation, political boundaries, lakes, and rivers. The maps are arranged by the map number.

Series V consists primarily of 1:125,000 (30 min) maps; it also includes 1:48,000; 1:96,000; and 1:250,000 maps. The 1:250,000 maps significantly predate the 1:250,000 maps in Series IV. Many of the sheets in this series have been encapsulated. The maps are arranged by scale and thereunder alphabetically by quadrangle name.