I have a patron who is looking for a historical GIS data showing a political boundary of the world in early 1900s till 1945. Before I started a process of creating a simple historical data I want to make sure that I am not trying to do something which is already done by someone. Any help will be appreciated. Thanks, -Wangyal Tsering Wangyal Shawa Geographic Information Systems Librarian Head, Digital Map and Geospatial Information Center Geosciences and Map Library Fine Hall B Level, Princeton University Princeton, NJ 08544 Phone: (609) 258-6804 Fax: (609) 258-4607 www.princeton.edu/~geolib/gis Tsering W Shawa ([log in to unmask]),Tsering W Shawa <[log in to unmask]> Geographic Information Systems Librarian Princeton University Library Geosciences and Map Library