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  2. State Plane Coordinate System - Wikipedia

    en.wikipedia.org/wiki/State_Plane_Coordinate_System

    Thus the state plane coordinate system is still useful. Originally, the state plane coordinate systems were based on the North American Datum of 1927 (NAD27). Later, the more accurate North American Datum of 1983 (NAD83) became the standard (a geodetic datum is the way a coordinate system is linked to the physical Earth). More recently there ...

  3. List of counties in Ohio - Wikipedia

    en.wikipedia.org/wiki/List_of_counties_in_Ohio

    The average population of Ohio's counties was 133,931; Franklin County was the most populous (1,326,063) and Vinton County was the least (12,474). The average land area is 464 sq mi (1,200 km 2 ). The largest county by area is Ashtabula County at 702.44 sq mi (1,819.3 km 2 ), and its neighbor, Lake County , is the smallest at 228.21 sq mi (591. ...

  4. List of principal and guide meridians and base lines of the ...

    en.wikipedia.org/wiki/List_of_principal_and...

    Primarily from the United States Government Printing Office Style Manual. [1] State names usually signify only parts of each listed state, unless otherwise indicated. Based on the BLM manual's 1973 publication date, and the reference to Clarke's Spheroid of 1866 in section 2-82, coordinates appear to be in the NAD27 datum.

  5. File:USA Ohio location map.svg - Wikipedia

    en.wikipedia.org/wiki/File:USA_Ohio_location_map.svg

    More than 100 pages use this file. The following list shows the first 100 pages that use this file only. A full list is available.. Amherst, Ohio; Andover, Ohio; Apple Creek, Ohio

  6. File:Ohio counties map.png - Wikipedia

    en.wikipedia.org/wiki/File:Ohio_counties_map.png

    Main page; Contents; Current events; Random article; About Wikipedia; Contact us

  7. Northwest Ohio - Wikipedia

    en.wikipedia.org/wiki/Northwest_Ohio

    The counties of Defiance, Fulton, Henry, Paulding, Putnam, Van Wert, and Williams in the state of Ohio are usually classified as Extreme Northwest Ohio. According to the 2000 Census, the population of this portion of NW Ohio is 234,660. When Allen and Hancock counties are included, the population is 414,428. Just like any other region, there is ...

  8. Administrative divisions of Ohio - Wikipedia

    en.wikipedia.org/wiki/Administrative_divisions...

    In counties with populations of 500,000 or less, approval must be won in a majority of the combined total of municipalities and townships of the county. [18] In the 2010 United States Census, the average population of Ohio's counties was 131,096; Cuyahoga County was the most populous (1,280,122) and Vinton County was the least

  9. List of counties by U.S. state and territory - Wikipedia

    en.wikipedia.org/wiki/List_of_counties_by_U.S...

    The following is a list of the 3,143 counties and county-equivalents in the 50 states and District of Columbia sorted by U.S. state, plus an additional 100 county-equivalents in the U.S. territories sorted by territory. [1] [2]