Digital Resource: Historical Maps

Maps are remarkable useful visual tools, as well as artifacts in themselves. It would be impossible to list all the on-line collections of maps of interest to historians, even limiting the list to those of particular interest to business and economic historians. Nevertheless, as new sites seem to spring up daily, we list below some sites that demonstrate the uses of maps:

U.S. Census Bureau Data Mapper
Land Ownership Maps, Boston (Leventhal Map Center)
Visualizing Economics (Catherine Mulbrandon)
A Long History of a Short Block (NYU Project) (map index is here)
Chicago series
David Rumsey Collection
Harvard
NYPL:  http://www.nypl.org/blog/2014/03/28/open-access-maps

Larger collections:
Sanborn Fire Insurance Maps. A nearly complete set is available on a fee basis via Pro-Quest (or through university and public libraries for affiliated users). All maps available freely end with 1922 to comply with copyright law. The websites are listed here.