Hmmm. After my earlier comments ( I was racing out the door, late for work ) I think the suggestion for a centralized admin panel for all maps is the way to go. And admins can simply add page URL’s in manually.
Yes, I have the same problem. I would like to re-use a map in different page contexts but it seems like a map is tied to the post/page. Then the shortcode for that map can be used anywhere on the blog or website. It would also be helpful be able to duplicate entries to minimize customizations.