A map of major cities in Louisiana can be found at the website Maps of the World, which marks the capitol city of Baton Rouge, major cities and smaller cities on its legend. A road map that includes major cities in Louisiana is available from Geology.com.
The website of the Nations Online Project offers a map of Louisiana with both roads and major geographic features. Major cities shown on the map include New Orleans, Lafayette, Baton Rouge, Lake Charles and Shreveport. The University of Southern Florida provides historical maps of Louisiana. For example, a map from 1919 shows major cities and other features.