Posted 11/19/2013 21:23 (#3455822 - in reply to #3454329) Subject: Re: Earth's curvature
Maquoketa, Iowa 52060
8" per mile. the reason GPS is more accurate over large areas, lasers are more accurate over small areas. when using GPS you MUST also use a GEOID to calibration GPS elevation / slopes to real-world slopes.
Earth's curvature
