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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. United States National Grid - Wikipedia

    en.wikipedia.org/wiki/United_States_National_Grid

    The United States National Grid (USNG) is a multi-purpose location system of grid references used in the United States. It provides a nationally consistent "language of location", optimized for local applications, in a compact, user friendly format. It is similar in design to the national grid reference systems used in other countries.

  4. Module:Location map/data/USA Southeast - Wikipedia

    en.wikipedia.org/wiki/Module:Location_map/data/...

    Module:Location map/data/USA Southeast is a location map definition used to overlay markers and labels on an equirectangular projection map of Southeastern United States. The markers are placed by latitude and longitude coordinates on the default map or a similar map image.

  5. Geographic center of the United States - Wikipedia

    en.wikipedia.org/wiki/Geographic_center_of_the...

    The GEOGRAPHIC CENTER of the UNITED STATES LAT. 39°50' LONG. −98°35' NE 1/4 – SE 1/4 – S32 – T2S – R11W Located by L.T. Hagadorn of Paulette & Wilson – Engineers and L.A. Beardslee – County Engineer. From data furnished by United States Coast and Geodetic Survey. Sponsored by Lebanon Hub Club. Lebanon, Kansas. April 25, 1940

  6. Module:Location map/data/USA Midwest - Wikipedia

    en.wikipedia.org/wiki/Module:Location_map/data/...

    Module:Location map/data/USA Midwest is a location map definition used to overlay markers and labels on an equirectangular projection map of USA Midwest. The markers are placed by latitude and longitude coordinates on the default map or a similar map image.

  7. State Plane Coordinate System - Wikipedia

    en.wikipedia.org/wiki/State_Plane_Coordinate_System

    In 1933, the North Carolina Department of Transportation asked the United States Coast and Geodetic Survey to assist in creating a comprehensive method for converting curvilinear coordinates (latitude and longitude) to a user-friendly, 2-dimensional Cartesian coordinate system.

  8. North American Datum - Wikipedia

    en.wikipedia.org/wiki/North_American_Datum

    The latitude and longitude of every other point in North ... Most USGS topographic maps were published in NAD 27 and many ... The United States National Spatial ...

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

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

    This is a list of extreme points in U.S. states, territories, and the District of Columbia. [1] Although many borders were initially defined by treaty or other agreement to be along a specific line of latitude or longitude, inaccuracies with surveying equipment/techniques caused the surveyed lines to deviate slightly from the true boundaries.