Lat/Long Coordinate Accuracy
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# National Water Information System
# 2024/10/29
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# Date Retrieved: USGS Water Data for the Nation Help System
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gw_ref_cd gw_ref_ds
1s 58s
H Accurate to + or - .01 sec (Differentially-Corrected GPS).
1 Accurate to + or - .1 sec (Differentially-Corrected GPS).
5 Accurate to + or - .5 sec (PLGR/PPS GPS).
M Accurate to + or - 1 min.
S Accurate to + or - 1 sec.
T Accurate to + or - 10 sec.
R Accurate to + or - 3 sec (SPS GPS).
F Accurate to + or - 5 sec.
B Level 1 survey-grade GPS
C Level 2 survey-grade GPS
D Level 3 survey-grade GPS
E Level 4 survey-grade GPS
U Unknown or unspecified.