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  2. List of tripoints of U.S. states - Wikipedia

    en.wikipedia.org/wiki/List_of_tripoints_of_U.S...

    South Dakota: True point is marked with a disc in the center of a T-shaped road intersection. [22] A witness monument nearby in the South Dakota corner acknowledges the tri-point being set in 1859. Kansas: Missouri: Oklahoma

  3. List of river borders of U.S. states - Wikipedia

    en.wikipedia.org/wiki/List_of_river_borders_of_U...

    In 1933, citing the 1782 legislation, the United States Supreme Court denied the petition from the state of Vermont to make the boundary the thread of the channel. The boundaries between Kentucky and West Virginia and the three states to their north – Ohio , Indiana , and Illinois – is based on the historical northern bank of the Ohio River ...

  4. Upper Midwest - Wikipedia

    en.wikipedia.org/wiki/Upper_Midwest

    The Upper Midwest is a northern subregion of the U.S. Census Bureau's Midwestern United States.Although the exact boundaries are not uniformly agreed upon, the region is usually defined to include the states of Iowa, Michigan, Minnesota and Wisconsin; some definitions include North Dakota, South Dakota, and parts of Nebraska and Illinois.

  5. 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.

  6. List of extreme points of U.S. states and territories - Wikipedia

    en.wikipedia.org/wiki/List_of_extreme_points_of...

    South Dakota border near the MT-SD-WY tripoint 48°00′00″N 116°02′57″W  /  48.00000°N 116.04917°W  / 48.00000; -116 Idaho border southwest of Heron

  7. Category:Borders of U.S. states by state - Wikipedia

    en.wikipedia.org/wiki/Category:Borders_of_U.S...

    Alaska and Hawaii do not share borders with any other U.S. state. ... Borders of Illinois (2 C, ... Borders of South Dakota (8 P) T.

  8. Geography of Illinois - Wikipedia

    en.wikipedia.org/wiki/Geography_of_Illinois

    Illinois has a maximum north–south distance of 390 miles (630 km) and 210 miles (340 km) east-west. Total area is 57,918 square miles (150,010 km 2 ), ranked 25th in size of the 50 states. Water area is 2,325 square miles (6,020 km 2 ); Lake Michigan accounts for most of this.

  9. Category:Borders of South Dakota - Wikipedia

    en.wikipedia.org/wiki/Category:Borders_of_South...

    Articles specifically about the borders of U.S. states, not simply about natural features that form the borders, unless there is detailed discussion about the border. Pages in category "Borders of South Dakota"