Once you create an object in Google Earth and import the KML to
HyperCities, though, you can move its location. So if you wanted to
create a map on a modern map and then fine-tune it in HyperCities when
you have access to a historic map, that's an option.
David
--
David Shepard
Project Manager, Hypercities (http://hypercities.com/)
PhD Candidate, Department of English
UCLA