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.[1][2] It is part of the Public Land Survey System that covers most of the United States.
The fourth principal meridian begins at a point on the west bank of the Illinois River in Schuyler County, Illinois. The fourth principal meridian's baseline, sometimes called the Beardstown baseline,[citation needed] runs west from this initial point.[1][2] The meridian and this baseline governs surveys in Illinois that are west of both the Illinois River and the third principal meridian.[2]
The Illinois Department of Transportation 2003 Survey Manual gives the point as 40°0′50″N90°27′11″W / 40.01389°N 90.45306°W / 40.01389; -90.45306 and notes that the meridian is an extension of the line north from the mouth of the Illinois River near Grafton, Illinois.[1]
^ abcd"Chapter Five: Land Surveying". Survey Manual(PDF). Springfield, Illinois: Illinois Department of Transportation, Bureau of Design and Environment. 2003-02-28. p. 5. Archived from the original (PDF) on 2011-05-25. Retrieved 2008-10-30.
^ abcdRaymond, William Galt (1914). Plane Surveying for Use in the Classroom and Field(via Google Books) (2nd ed.). New York: American Book Company. p. 456.
^"Part 5: Public Land Survey System". National Mapping Program Technical Instructions: Standards for USGS and USDA Forest Service Single Edition Quadrangle Maps(PDF) (Draft for Implementation ed.). March 2003. pp. 5A-2–5A-4. Retrieved 2008-10-31.
and 13 Related for: Fourth principal meridian information
The fourthprincipalmeridian, set in 1815, is the principalmeridian for land surveys in northwestern Illinois and west-central Illinois, and its 1831...
A principalmeridian is a meridian used for survey control in a large region. The Dominion Land Survey of Western Canada took its origin at the First (or...
Greenwich Meridian The FourthPrincipalMeridian in Illinois, United States, 90°27'11" west of Greenwich The FourthPrincipal Extended Meridian in Minnesota...
(principalmeridian) and one east–west (base) line that control descriptions for an entire state or more. For example, a single Willamette Meridian serves...
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'...
Regular astigmatism – principalmeridians are perpendicular. (The steepest and flattest meridians of the eye are called principalmeridians.) With-the-rule...
long-standing rival to the Greenwich meridian as the prime meridian of the world. The "Paris meridian arc" or "French meridian arc" (French: la Méridienne de...
surveyor Lucius Lyon in 1831 near Hazel Green, Wisconsin (the FourthPrincipalMeridian) and used the Illinois boundary for a baseline. Development based...
formation was discovered in 1848 by Dr. A. Randall during the Fourthprincipalmeridian survey near Upson, Wisconsin. Ore was first produced in 1883 from...
new name of Tampines Meridian Junior College, which is the combination of the two schools' names, from 2019. TPJC's current principal, Ms Pamela Yoong, will...
although its principal application is to accurate large-scale mapping "close" to the central meridian.[citation needed] Near the central meridian (Greenwich...
Global Information