OK, so I'm getting a little closer to my problem. In iPhoto, I can elicit the map to flip over on the back of a picture by hovering over the picture and clicking the "i" at the bottom right corner of the photo. I can't elicit the "i" in any photo in Aperture. Have I botched up the settings?
There is no "i" flipper in Aperture for individual photos (afaik). (There is one for Projects.)
Have you tried selecting a photo and clicking the Places button on the toolbar (or just "{Shift}+{p}")?
You can also use the map on the bottom of the Metadata tab of the Inspector (but that is more complicated).
Again, there is a wealth of information about this in the Help file and in the User Manual. "Help>>Aperture Help>>Aperture 3: User Manual"