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Lat/Long in DMS Coordinate Datum Codes

Gw Ref Cd Gw Ref Ds
C Calculated from land net
D Differentially corrected Global Positioning System.
W GNSS1 - Level 1 Quality Survey Grade Global Navigation Satellite System
X GNSS2 - Level 2 Quality Survey Grade Global Navigation Satellite System
Y GNSS3 - Level 3 Quality Survey Grade Global Navigation Satellite System
Z GNSS4 - Level 4 Quality Survey Grade Global Navigation Satellite System
N Interpolated from Digital MAP.
M Interpolated from MAP.
L Long range navigation system.
G Mapping grade GPS unit (handheld accuracy range 12 to 40 ft)
R Reported.
F Survey-grade GPSF
S Transit, theodolite, or other surveying method.
U Unknown.