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  2. 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.

  3. Geography of the United States - Wikipedia

    en.wikipedia.org/wiki/Geography_of_the_United_States

    The term "United States," when used in the geographic sense, refers to the contiguous United States (sometimes referred to as the Lower 48, including the District of Columbia not as a state), Alaska, Hawaii, the five insular territories of Puerto Rico, Northern Mariana Islands, U.S. Virgin Islands, Guam, American Samoa, and minor outlying possessions. [1]

  4. Cartography of the United States - Wikipedia

    en.wikipedia.org/wiki/Cartography_of_the_United...

    The cartography of the United States is the history of surveying and creation of maps of the United States. Maps of the New World had been produced since the 16th century. The history of cartography of the United States begins in the 18th century, after the declared independence of the original Thirteen Colonies on July 4, 1776 , during the ...

  5. Geology of the United States - Wikipedia

    en.wikipedia.org/wiki/Geology_of_the_United_States

    Shaded relief map of the United States, showing 10 geological provinces. The richly textured landscape of the United States is a product of the dueling forces of plate tectonics, weathering and erosion. Over the 4.5 billion-year history of the Earth, tectonic upheavals and colliding plates have raised great mountain ranges while the forces of ...

  6. Physiographic regions of the United States - Wikipedia

    en.wikipedia.org/wiki/Physiographic_regions_of...

    The physiographic regions of the contiguous United States comprise 8 divisions, 25 provinces, and 85 sections. [1] The system dates to Nevin Fenneman's report Physiographic Divisions of the United States, published in 1916. [2] [3] The map was updated and republished by the Association of American Geographers in 1928. [4]

  7. Eastern United States - Wikipedia

    en.wikipedia.org/wiki/Eastern_United_States

    The Eastern United States, often abbreviated as simply the East, is a macroregion of the United States located to the east of the Mississippi River. [1] It includes 17–26 states and Washington, D.C., the national capital. As of 2011, the Eastern United States had an estimated population exceeding 179 million, representing the majority (over ...

  8. Mean center of the United States population - Wikipedia

    en.wikipedia.org/wiki/Mean_center_of_the_United...

    Map showing changes to the mean center of population for the United States, 1790–2020 (US Census Bureau) [1] Map of the Position of the U.S. Geographic Center of Area, Mean Center of Population, and Median Center of Population, 2020 (U.S. Census Bureau) [2] The center of the US population, 13th census (1910), near Bloomington, Indiana The center of the US population, 13th census (1910), near ...

  9. 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. [1]