PLSS Map

http://oliviasmapcatalog.blogspot.com/2012/04/public-land-survey-system-plss.html

Above is PLSS Map, which is short for Public Land Survey System, this is used to record ownership of property by sections or township.  This system generally uses a 1:100,000 scale and is one of the most historic land use survey systems used in the United States.  Shown in this PLSS Map is the Worthington quadrangle and how this particular area is separated into sections.