Second: Under Research Tools select USF Libraries Catalog.
Third: Click the circle next to Advance Search.
Fourth: Under Format select Maps.
Now you will only be searching for maps in the Library Catalog. In the top search boxes you may now enter your search terms or keywords. Terms like topographical and geological are helpful as are location names of the areas you are researching. You may also enter a date or date range to find maps of an area during a specific time period.
More Geography Sources
If you're looking for more information on geography/maps/GIS, try this guide to geography sources.