Maps can provide fun and interesting way to research your ancesstors. Historical Plat Maps frequently show ownership of land. The following links include a variety of sources for your research.
David Rumsey Map Collectionhttp://www.davidrumsey.com
Historic Map WorksUse search box type “county, state Plat Map” for example.http://www.historicmapworks.com/
University of Iowa Libraries Use their search box “county name Plat Map” for example.http://digital.lib.uiowa.edu/maps/
Sanborn Map Abbreviationshttp://www.newberry.org/sites/default/files/researchguide-attachments/sanbornabbrv.pdf
Atlas of Historical County Boundarieshttp://publications.newberry.org/ahcbp/index.html
RESEARCH BY CATEGORY
RESEARCH BY STATE
RESEARCH BY COUNTRY