I grew up east of the Iowa/Missouri border, so this boundary dispute was well-known ... and occurred at same time Joseph Smith (Mormons) was at Nauvoo, IL (1839-1844). In 2006, the Iowa-Missouri border was investigated with GPS, as much an archeology project as locating the historic Sullivan & Brown survey markers. http://www.theamericansurveyor.com/PDF/TheAmericanSurveyor_MO-IABoundaryLineInvestigation_Mar-Apr2006.pdf Iowa-Missouri Border War (1826-1849) http://iagenweb.org/history/soi/soi32.htm
NOAA’s : National Geodetic Survey (NGS) made news in 2009 when media reported that the Four Corners monument was in wrong place (by 2.5 miles). Deseret News https://www.deseretnews.com/article/705299160/Four-Corners-Monument-is-indeed-off-mark.html NOAA statement and clarification https://www.ngs.noaa.gov/INFO/fourcorners.shtml == I’m in France and I don’t think that any borders in Europe were defined by astronomical observation, but in the US I believe that at least some of the state borders were thus fixed. As a second’s error in time will be about a nautical mile in US latitudes, I wonder if anyone has measured with GPS, how good the original surveys were? Sent from iPad Air _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
