-------- Original Message -------- Subject: Census Tract Shapefiles Date: Thu, 8 Mar 2007 12:06:08 -0800 From: Deckelbaum, David <[log in to unmask]> To: <[log in to unmask]> While using Social Explorer (www.socialexplorer.com <http://www.socialexplorer.com>) I noticed on their website they have a link to the National Historical Geographic Information System (http://www.nhgis.org/) where you can download tract boundary files and data from the 1940 census onward. David David Deckelbaum Librarian for Cartographic Resources, Geography, and Urban Planning YRL Collections, Research and Instructional Services Young Research Library, Room A4510 Phone 310 206 6793 Fax 310 825 6795