...depending on how spiffy (I mean, "user-oriented" ;) you want it to be.
I wouldn't expect a data-entry clerk (whoever that is) to know the first thing about X and Y cord'nutz. I would want (in a perfect world) to give them some kind of interface so they can edit the map themselves graphically. Doing that in HTML is difficult (but not impossible if you have a fast server).
May I suggest a standard grid instead? It would make the "selection" of map points easy; it would make the actual imagemap areas a walk in the park, and you could update the underlying map file with a different tool, like Paint Shop Pro or something, on an as-needed basis (not on the Web).
You can find the MAP and AREA tag specs for HTML 4 at [link|http://www.w3.org/TR/html4/struct/objects.html#edef-MAP|http://www.w3.org/T...tml#edef-MAP]
As for Leadtools?...you're on your own.