Newtonsapple is absolutely correct. NAVD 88 and even NGVD 29 are not the same as Mean Sea Level. MSL, which should actually be referenced as Local M...
Send a note to John C Fouke (jfouke@usgs.gov). All of their vertical data will be in NGVD 29. If you don't have a response by Monday send me note wi...
In the U.S. this is called the Airport Reference Point (ARP). The NGS method to compute the ARP can be found at --
DSWorld will also allow you to submit new positions from hand-held or RTK GPS solutions for bench marks that currently only have scaled horizontal coo...
The local mean sea level height for the primary bench mark at the tide station at Lamesure Bay, 975 1381 A (pid DL3636) was used to define VIVD09 real...
Larry,The field crew you ran into was from NGS not USGS. The leveling for all of VI has been completed. A technical article describing the Virgin Is...
Ground to Grid...my 2 bitsA minor correction to BigE's post. The elevation factor is most correctly computed from the ellipsoid height which is defin...
Do yourself a favor and download DSWorld --
I don't know what you put into VERTCON, but when I use your position and the NAVD 88 height of 162.367 m you got from OPUS-RS I get an NGVD 29 value o...
NGS is evaluating any motion that may have resulted from the "event" using the region CORS data. We hope to be able to post the results shortly.
survey trivia part trey8 - It depends on the datum are you referring to? With NAD 83 is about 2.2 m, with New Zealand Geodetic Datum of 2000 it's in ...
Good questions Loyal. The epoch will still be 2010.0 no change to that. The info on the CORS Multi-year Beta page is for all practical purposes fina...
I'll be there.
If you're considering a digital level you might want to also consider investing in attending the upcoming NGS training on digital leveling -- Digital ...
USC&GS had a similar townThe U.S. Coast & Geodetic Survey (USC&GS)/National Geodetic Survey (NGS) had a similar town - Haddam, Kansas. Se...
