This journal article from Reference Services Review discusses electronic maps. The article lists web sites for online maps but also talks about how to save and use the maps you find. You should find most if not all of the sites listed in the article in our online catalog or annotated below.
For more assistance, please contact the Evans Map Room directly.
This page highlights digital map images of the world and various continents and countries that we have in our Library's collections.
Look in various image databases. They have maps too!