Revisited this topic, since someone asked about the Whitney elevation...

The elevation of Mt Whitney, and the various survey markers on the summit jumped in the past ten years, due to some high-tech mapping decision. I think it is related to a mapping standard called "GEOID12A".

So I did some digging, found this thread, and then looked up the various NGS "datasheet" links for the survey markers. Unfortunately, reading the text provided on the datasheet web pages is really confusing. I wish I could find a decent translation and explanation.

Here is the list I could find of the Mt Whitney markers:

  ID   Elev     Coordinates                          Coordinates (converted)
GT1808 14505   36 34 42.70332 N  118 17 32.20132 W   36.5785287,-118.2922781
GT1809 14508   36 34 42.98864 N  118 17 31.18685 W   36.5786080,-118.2919963
GT1810 14508   36 34 42.98800 N  118 17 31.18625 W   36.5786078,-118.2919962
GT1811 14505   36 34 42.89133 N  118 17 31.18182 W   36.5785809,-118.2919950
GT1812 14505   36 34 43.06578 N  118 17 31.11753 W   36.5786294,-118.2919771
GT1813 14501   36 34 43.06277 N  118 17 31.11628 W   36.5786285,-118.2919767

GT0237 14502.7 36 34 45.      N  118 17 31.      W 
GT0238 14499.2 36 34 42.99022 N  118 17 31.09025 W   36.5786084,-118.2919695
GT0239 14499.6 36 34 42.96827 N  118 17 31.25596 W   36.5786023,-118.2920155


The NGS datasheet URL for each one looks like this:
http://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=GT1810
Change the GT1810 in the URL to any of the others brings up the associated page of info.

Here is the gmap4/google aerial satellite view using the converted coordinates for the GT1810 data:
http://www.mappingsupport.com/p/gmap4.php?ll=36.5786078,-118.2919962&z=20&t=s&symbol=pr
The aerial view shows where the survey marker is located on the summit.