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Datums for 8575512, Annapolis MD


NOTICE: All data values are relative to the MLLW.

Elevations on Mean Lower Low Water

Station: 8575512, Annapolis, MD
Status: Accepted (Oct 12 2011)
Units: Feet
Control Station:
T.M.: 75
Epoch: 1983-2001
Datum: MLLW
DatumValueDescription
MHHW1.43Mean Higher-High Water
MHW1.19Mean High Water
MTL0.70Mean Tide Level
MSL0.72Mean Sea Level
DTL0.72Mean Diurnal Tide Level
MLW0.22Mean Low Water
MLLW0.00Mean Lower-Low Water
NAVD880.77North American Vertical Datum of 1988
STND-4.52Station Datum
GT1.44Great Diurnal Range
MN0.97Mean Range of Tide
DHQ0.24Mean Diurnal High Water Inequality
DLQ0.22Mean Diurnal Low Water Inequality
HWI10.04Greenwich High Water Interval (in hours)
LWI3.97Greenwich Low Water Interval (in hours)
Max Tide7.16Highest Observed Tide
Max Tide Date & Time09/19/2003 11:54Highest Observed Tide Date & Time
Min Tide-3.92Lowest Observed Tide
Min Tide Date & Time12/31/1962 20:12Lowest Observed Tide Date & Time
HAT1.94Highest Astronomical Tide
HAT Date & Time06/22/1986 10:12HAT Date and Time
LAT-0.62Lowest Astronomical Tide
LAT Date & Time01/21/2000 15:54LAT Date and Time
Tidal Datum Analysis Periods
01/01/1983 - 12/31/2001
To refer water level heights to NAVD88 (North American Vertical Datum of 1988), apply the values located at National Geodetic Survey.




Products available at 8575512 Annapolis, MD

Revised: 10/15/2013
NOAA / National Ocean Service
Web site owner: Center for Operational Oceanographic Products and Services