Hot off the press and on the heels of my post yesterday, Steve Morse and Joel Weintraub announce an update on the 1940 census:
The National Archives (NARA) has recently uploaded the 1940 Enumeration District (ED) maps to their website. These ED maps will be very useful for searching rural and small urban areas.
The maps can be located using NARA's Archival Research Catalog (ARC) at http://arcweb.archives.gov/arc/action/BasicSearchForm . The ARC search form isn't the easiest to use, so Steve Morse has produced a simpler search form for rapidly getting to these maps. The new utility entitled: "Viewing 1940 ED Maps in One Step" is at http://www.stevemorse.org/census/arc1940edmaps.html
We have revised our tutorial/quiz at http://stevemorse.org/census/quiz.php to reflect this new locational resource for the upcoming 1940 census.