The 3rd floor Maps area is where the general circulating maps are located. Most cases are unlocked, and you can look for the maps you need yourself. Some of the maps in this area are in 1Search, but others are only listed in the physical Map Room card catalog, so you may need to look for call numbers in both places. Assistance with these can be obtained from the Information Desk on the main floor.

Location: 3rd Floor Maps [map]

Topographic Maps

• U.S. Geological Survey 7.5' topographic maps ('topos') are arranged alphabetically by the name of the sheet within the appropriate state. To find the name of the sheet, you must use the topo map indexes for the state (on Reference table near the collection). Folders are indexed on the cards inside the lid of each case.
• Special editions of national park topos are arranged by call numbers. To find the call numbers, look up the park by name in  1Search.
• Be aware that these maps are a legacy collection; except in special cases paper maps are no longer updated. The official US Topo Quadrangle maps are now online, and are updated every 3 years. The previous online (legacy) quads are then moved into the USGS Historical Topographic Map Collection.
• USGS New FactSheet on USTopo online map collection is available online.

AMS Series: Army Map Service Topographic Map Series / U.S. Army Map Service Historic collection

• The Army Map Service (AMS) of the US Army Corps of Engineers, was the premier map making agency of the US Department of Defense from 1941-1968. The major task of the AMS was the compilation, publication and distribution of military topographic maps and related products required by the Armed Forces of the United States.
• Maps are of historical significance: dating primarily from the 1940s and 1950s, they provide excellent detail of areas of military concern. Excellent for locating tiny villages, finding islands which are not named or visible in other sources, and rich in topographic detail.
• Kept in locked cases on the south wall; index maps in atlas case against nautical charts (west side). These cases can only be accessed by request; please stop by the Info Desk on the 2nd floor for more information.
• Online versions: The Perry-Casteneda Library at the University of Texas has digitized these maps and made them available online.

USGS Geological Maps Series

Location: Planfiles (vertical storage) cases 3-12; arranged by series number within the call number range. All should have a record in the physical and/or the online catalogs.

• Geologic Quadrangle Maps    G3701.C5 svar U51 GQ-
• Hydrologic Investigations Atlas  (HA)   G3701.C3 svar U5 HA-
• Miscellaneous Geologic Investigations  (I)     G3701.C5 svar U52 I-
• Miscellaneous Field Studies  (MF)   G3701.C5 svar U5 MF-
• Land Management Maps (BLM)--Surface Management Maps; Surface and Mineral Management Maps   G3701.G45 s100 U5L3 [name]
• Coal Investigations (C)   G3701 H9 svar U5 C-

Cases 52-62 contain non-public materials that only staff can access. Exceptions to this are:

1. Drawers with call numbers, which are maps labeled STORAGE and tend to be old maps that may (or may not) have historical interest; you can find these listed in the Map Card Catalog. 
2. Maps that are indexed but not cataloged (no call number), which are largely foreign in origin. 

If you wish access to any of these, please contact Brad Engelbert (brad.engelbert@oregonstate.edu; (541) 737-7036).

Here is a list of contents that may be accessed; all other drawers and cases are staff only.

Location: 5th Floor, Valley Media

Oregon Digital Orthophoto Quadrangles

• Digital orthophoto quads (DOQs) are available for all of Oregon. The CD-ROMs in this 526 CD set are available on the 5th floor in Valley Media, call number G4291 .A4 s24 .O72. To determine which CD(s) to check out for a particular area, use the online index. The index is searchable by place name or longitude/latitude coordinates.

USGS National Elevation Dataset (NED)

• The USGS Digital Elevation Model (DEM) data files that make up the National Elevation dataset are available for all of the conterminous United States, Alaska and Hawaii. The CD-ROMs in this 73 CD set are located on the 5th floor in the Valley Media section, call number G3701.C2 N38 2002.