Wikia Maps is a map creation tool that enables you to create maps on pictures that you upload to the service. Wikia calls those maps custom maps. You can also use Wikia Maps to create maps in a manner similar to those that you may have previously created in Google Maps. Wikia calls those maps "real maps." In the video below I demonstrate how to create a custom map on Wikia Maps.
Applications for Education
My first thought when I saw the custom option in Wikia Maps was that it could be a good tool for students to use to create maps about fictional places they have read about in their favorite books. To do this students would draw a map of what they think a fictional town or fantasy world looks like then upload the drawing to Wikia Maps.