Here is a short history of my involvement with campus maps.
From 2001-2012, the online version of the campus map was a clickable web page that dropped the user into various grids or closeups of the map. Associated parking maps were hyperlinked to these detail pages. This was a project managed by my colleague Susan Willats. I had been involved in helping with providing a server, log management, etc. At some point I showed her what we could do with Drupal that would enhance this service used by visitors and the community at large.