Answered By: Lorraine Hopper Last Updated: Jul 31, 2017 Views: 12
Although we own a few resources provided through ProQuest, Drake does not have access to the Proquest Digital Sanborn maps database.
University of Iowa is supposed to have access to this database. I would contact the library there concerning any access for non-affiliated persons.
Library of Congress has not digitized any of the Chicago maps:
for additional resources.