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Bill93

NGS releases Geodetic Control Diagrams

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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/

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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.

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