Stone four corners monument
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Grand Junc*on Sept. 24, 2014
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Transcript of Stone four corners monument
Grand Junc*on Sept. 24, 2014
Four Corners Region – GPS Control Sta4ons
G e o d e t i c --------------
h7p://bungalowbillscw.blogspot.com/ 2009/04/government-‐mistake-‐four-‐corners.html
h7p://owencogis.weebly.com/mapping-‐blog.html
109deg W
37deg N Four Corners
2.5 mi
Albuquerque Journal – April 30, 2009
Washington Meridian - Old Naval Observatory
(1850-1912)
1863 Act of Congress
Separated Arizona & New Mexico at 32nd Meridian West of
Washington Meridian
77deg – 03min W (Greenwich)
The Washington Meridian
! established by Congress in 1850 ! longitude…it’s all about *me! ! telegraph:
! 1844 – Washington-‐Bal*more (“What hath God wrought?”) ! 1861 – trans-‐North America ! 1866 – trans-‐Atlan*c ! specified for astronomical & domes*c purposes -‐ (Greenwich for nau*cal & interna*onal purposes)
! defined by Old Naval Observatory in D.C. ! used for most Western State boundaries (not AK, CA, TX) ! 1884 Interna*onal Meridian Conference (D.C.) ! repealed by Congress in 1912 in favor of Greenwich
11 miles 49.39 chains
Chandler Robbins AZ-NM Survey
32nd Meridian West of Washington Meridian (=109 deg – 03 min W)
1868: Ehud Darling – CO & NM Terr.
1875: Chandler Robbins – AZ & NM Terr.
37 deg N la4tude
“It seems to have been the general impression that the line was the 109 degrees of longitude west of Greenwich. Such is not the case, as the law makes it 32 degrees of longitude west from Washington, which corresponds to 109 degrees 02 minutes 59.25 seconds west from Greenwich, and which places the line a small fraction less than three miles farther west than would have been the case if it had been run as the 109 degrees of longitude.”
Chandler Robbins, GLO Surveyor
Le7er to the Editor -‐ Santa Fe New Mexican -‐ November 1, 1875
The Four Four Corners Surveys
1868: Ehud Darling – CO & NM Terr.
1878: Rollin Reeves – State of CO & UT Terr.
1901: Howard Carpenter – AZ & UT Terr.
1875: Chandler Robbins – AZ & NM Terr.
Shared OPUS Solu*ons
“The location of anything is becoming
everything.” ESRI 2009 User Conference Opening Plenary
William Stone [email protected]
