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Thanks to Todd Ehret of NOAA CO-OPS for providing the leveling data and Clyde Kakazu, Marti Ikehara, and Stephen Gill for valuable discussion about the NGS/CO-OPS leveling procedures and data handling and archiving.



Physical point on tide gage used for leveling


Physical point on tide gage used for leveling

Primary Bench Mark (PBM)

Benchmark which defines the local vertical datum


Physical point on tide gage used for leveling (reference mark of electric tape gage)
STAFF STOP Physical point on tide gage used for leveling

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