Here are some strategies for finding images of virtually anything using the Library Catalog.
The library holds many types of maps--topographic, military, railroad, urban, land use, ethnographic and linguistic--to name a few. Below are some sample searches, but this list is by no means comprehensive.
Chicago (Ill.) -- Zoning Maps
Indians of North America -- Maps
City planning--[insert place]--Maps
[insert place]--Aerial views
Maps are found in many formats, from single sheets to aerial photographs and dynamically-generated tables. Most of any big library’s maps are found in books and journal articles and are not cataloged separately. There is an index of maps in books and journals, but often it is not very complete. Subject and author searches are the commonest way to locate maps in books and journals. For example:
Author: Rand McNally & Company (commercial firm)
Author: Geological Survey (U.S.) (government agency)