NGS releases Geodetic Control Diagrams

[Bill93 1]

They are testing a beta release of an interactive map that lets you see the actual linkages in the triangulation networks, and the general route of leveling by both C&GS/NGS and USGS.

https://beta.ngs.noaa.gov/gcd/

[mloser 0]

Interesting! I have a few of the paper maps from way back, but this is pretty neat. I'm still not sure what to do with the data, but I will definitely take a look around.