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Description
Unidentified surveyors conducting astronomic observations for longitude withDavidson Meridian Instrument. Plane table operations are being conductedconcurrently (Image credit: NOAA/NOS/NGS; NOAA Central Library Historical Collections)
Credit
NOAA/NOS/NGS; NOAA Central Library Historical Collections
Display Date
1890 circa.
Location
Alaska
Collection
Historic Coast & Geodetic Survey