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  2. Geography of Illinois - Wikipedia

    en.wikipedia.org/wiki/Geography_of_Illinois

    The Illinois side includes Henry County, Mercer County, and Rock Island County. [4] In extreme northwestern Illinois the Driftless Zone, a region of unglaciated and therefore higher and more rugged topography, occupies a small part of the state. Charles Mound, located in this region, is the state's highest elevation above sea level.

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

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

    Figure 1. This BLM map depicts the principal meridians and baselines used for surveying states (colored) in the PLSS.. The following are the principal and guide meridians and base lines of the United States, with the year established and a brief summary of what areas' land surveys are based on each.

  4. List of counties in Illinois - Wikipedia

    en.wikipedia.org/wiki/List_of_counties_in_Illinois

    Illinois also has two counties named after the same person, New York governor DeWitt Clinton (DeWitt County, and Clinton County). Information on the FIPS county code , county seat , year of establishment, origin, etymology , population, area and map of each county is included in the table below.

  5. Fourth principal meridian - Wikipedia

    en.wikipedia.org/wiki/Fourth_Principal_Meridian

    U.S. Bureau of Land Management map showing the principal meridians of Ohio, Indiana, and Illinois. The fourth principal meridian, set in 1815, [1] is the principal meridian for land surveys in northwestern Illinois and west-central Illinois, [2] and its 1831 [3] extension is the principal meridian for land surveys in Wisconsin and northeastern Minnesota.

  6. Outline of Illinois - Wikipedia

    en.wikipedia.org/wiki/Outline_of_Illinois

    The following outline is provided as an overview of and topical guide to the U.S. state of Illinois: Illinois – fifth most populous of the 50 states of the United States of America. Illinois lies between Lake Michigan and the Mississippi River and the Ohio River in the Midwestern United States.

  7. National Geographic says this southern spot offers the best ...

    www.aol.com/national-geographic-says-southern...

    In the publication’s Oct. 4 article “Here are the best ways to get outdoors in all 50 states,” National Geographic listed its picks for the top outdoor adventure in every state.

  8. Third principal meridian - Wikipedia

    en.wikipedia.org/wiki/Third_Principal_Meridian

    U.S. Bureau of Land Management map showing the principal meridians in Illinois, Indiana, and Ohio. The third principal meridian begins at the mouth of the Ohio River and extends north to the northern boundary of the state of Illinois, and with the base line in latitude 38° 28′ 20″ [vague], governs the surveys in the state east of the third principal meridian, with the exception of those ...

  9. Administrative divisions of Illinois - Wikipedia

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

    The basic subdivisions of Illinois are the 102 counties. [2] Illinois has more units of local government than any other state—over 8,000 in all. [3] The Constitution of 1970 created, for the first time in Illinois, a type of "home rule", which allows localities to govern themselves to a certain extent. [4]