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Cutout and contrast enhanced Position data N 40 57.722 W 112 12.963 Elevation 6607 From the USGS data sheet comes the following information for the Frary Peak marker: LP0355 *CURRENT SURVEY CONTROL LP0355 ___________________________________________________________________ LP0355* NAD 83(1994)- 40 57 43.29698(N) 112 12 57.79312(W) ADJUSTED LP0355* NAVD 88 - 2012.3 (meters) 6602. (feet) VERTCON LP0355 ___________________________________________________________________ LP0355 LAPLACE CORR- 2.39 (seconds) DEFLEC99 LP0355 GEOID HEIGHT- -17.00 (meters) GEOID99 Using Mapsource to convert the data from Degrees.Minutes.Minutes to Degrees.Minutes.Seconds you Get: N 40 57.722 W 112 12.963 (NAD 83) The Horizontal position is within the round off error of the data while the altitude error is 5 feet. Another photo of the receiver next to a marker just a couple yards away:
From the USGS data sheet, I get the following info, but I'm not completely sure how to compare it to the GPS receiver data: LP0355|---------------------------------------------------------------------| LP0355| PID Reference Object Distance Geod. Az | LP0355| dddmmss.s | LP0355| CM4189 ANTELOPE RM 4 2.300 METERS 11408 | LP0355| CM4187 ANTELOPE AZ MK 1574220.7 | LP0355| CM4188 ANTELOPE RM 3 2.577 METERS 35346 | LP0355|---------------------------------------------------------------------| I saved the position as a waypoint, which looking at the data with ExpertGPS shows the position as being off by 9.1 feet.
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