Portland State maintains a set of topographic maps for various regions, states, national parks, etc. of the United States. The maps are stored in map cabinets 1-11. (Those cabinets marked by a brown square tag.) The topographic maps are published in series, each series having a defining scale:

 

Primary map series (Scale 1:24,000)
County map series (Scale 1:50,000)
30 x 60 minute series (Scale 1:100,000)
1 x 2 degree series (Scale 1:250,000)
Sectional map series (Scale 1:2,000,000)
State map series (Scale 1:500,000 and 1:1,000,000)

 

The quadrangles of the Primary map series are arranged alphabetically by state, and alphabetically by quadrangle name within each state. So for the County map series. Other series are arranged alphabetically by map name. In addition to the above series (stored in map cabinet 11) are:

 

Antarctica
Mexico Border Maps
National Parks and Monuments

15-minute quadrangle maps series (1:62,500 Scale)

This series was abandoned effective 1 June 1996. USGS 7.5-minute (1:24,000) series is the official replacement for the 15-minute series, except for Alaska which is not yet mapped to 1:24,000. Fifteen-minute quadrangles, along with historic editions of all maps, are kept only for the states of Oregon, Washington, Idaho and Nevada.

INDEXES

(State) Index to Topographic and other Map Coverage: U.S.Geological Survey. National Mapping Program. (date varies)

Foldout index maps that identify quadrangle areas by map name and scale.

Filed in red plastic pamphlet boxes labeled Topographic Map Indexes behind the reference desk on the 5th floor.

(State) Catalog of Topographic and other Published Maps: U.S.Geological Survey. National Mapping Program. (date varies)

A companion publication to the (State) Index to Topographic and other Map Coverage. Alphabetically lists maps and map products, grouped by map type and scale, including names, dates, and prices of all available maps: topographic maps, orthophotoquads, State maps, satellite images, United States maps, and World maps.

Superseded by [State] Map Lists.

Filed in green plastic pamphlet boxes labeled Topographic Map Catalogs in the map workroom on the 4th floor.

(State) 7.5 minute Quadrangle Names: U.S. Geological Survey. (date varies)

Index maps for scale 1:24,000. One for each state.

Filed by state in red pamphlet boxes labeled Index maps. Scale=1:24,000 behind the reference desk on the 5th floor.

Index maps for 7.5 minute quadrangles for Oregon, Washington, Idaho and Nevada, are taped to the top of their respective map cabinets.

Topographic Map Symbols: U.S. Geological Survey

This two page pamphlet is a guide to symbols for topographic maps, representing such features as streets, buildings, streams and woods.

Filed in red pamphlet box labeled Indexes: USGS behind the reference desk on the 5th floor.

USGS Map Indexes: U.S. Geological Survey

The USGS publishes several map indexes for small and intermediate-scale mapping, and others depicting mapping status, aerial photography, land cover maps, etc. Among these are indexes for:

Antarctica: Topographic and other Map Coverage
United States-Mexico Border: Color Image Maps
National Park system: Topographic Map Coverage

Filed in red pamphlet box labeled Indexes: USGS behind the reference desk on the 5th floor.