Campus Maps
The offical campus map is provided by concept3D and has a multitude of useful categories along with the ability to produce dynamic categories
If those do not provide the necessary functionality then you can use a custom google map by following the instructions on google help site for custom maps. Please note that you should use a departmental google account so that the maps will remain accessible even as faculty and staff leave or transfer from their respective units. Instructions for how to do that can be found on the google page for creating an account.