BENCHMARKS (NOAA) --
Geodetic Control Points, 2005 (Source scale is unknown)
Shows geodetic control stations maintained by the National Oceanic and Atmospheric Administration, National Geodetic Survey. Each geodetic control station has either a precise latitude and longitude used for horizontal control or a precise height used for vertical control (units are meters above the geoid), or both.
FGDC metadata: BENCHMARKS_NOAA_IN