http://oceanservice.noaa.gov/news/features/nov13/survey.html
The link above is to an article in the NOAA newsletter with some nice photos of the recent survey of the Washington Monument.
GPS Total Station surveying tool?
.
GPS Total Station surveying tool?
See: https://www.google.com/#q=gps+total+station&safe=on
Or
GPS mounted atop total station == GPS total station
I was unaware of an east coast earthquake that had an intensity considered enough to alter the height or elevation of the monument. I think that was an K & E transit in the 30's photo, but not sure of that. Must have been a fun survey.
> I was unaware of an east coast earthquake that had an intensity considered enough to alter the height or elevation of the monument.
Magnitude 5.8 probably isn't enough to hold anyone's attention in Orange County but, as it equaled the biggest one on the east coast since they have been keeping records, it was reported in all the papers at the time.
The 1930s survey used a Parkhurst theodolite. See: http://celebrating200years.noaa.gov/theodolites/parkhurst.html