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Public Land Surveys Having No Initial Point as a Origin for Both Township and Range Numbers
Ohio River Survey (Ohio) - 1785
U.S. Military Survey(Ohio) - 1797
West of the Great Miami(Ohio) - 1798
Ohio River Base (Indiana) - 1799
Scioto River Base(Ohio) - 1799

Muskingum River(Ohio) - 1800
Between the Miamis, North of Symmes Purchase(Ohio) - 1802

Twelve Mile Square Reserve(Ohio) - 1805


Second Principal Meridian
Adopted 1805. Governing surveys -Illinois and Indiana. Initial Point - Latitude 38-28-14, Longitude 86-27-21

Third Principal Meridian
Adopted 1805. Governing surveys -Illinois. Initial Point - Latitude 38-28-27, Longitude 89-08-54

Fourth Principal Meridian
Adopted 1815. Governing surveys - Illinois. Initial Point - Latitude 40-00-50, Longitude 90-27-11
Extended 1831. Governing Surveys - Minnesota and Wisconsin. Initial Point -Latitude 42-30-27 , Longitude 90-25-37

Michigan Meridian
Adopted 1815. Governing surveys -Michigan and Ohio. Initial Point - Latitude 42-25-28, Longitude 84-21-53

First Principal Meridian
Adopted 1819. Governing surveys -Ohio and Indiana. Initial Point - Latitude 40-59-22, Longitude 84-48-11