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EA:  TIDAL_DATUM

Status: STD 2005/06/07
Code: 1438
Concept definition: A level of a <WATERBODY> defined by some phase of the <TIDE>, from which water <<DEPTH>>s and <<TIDE_LEVEL>>s are reckoned; tidal datum.
 
Attribute value type: ENUMERATION
Reference type: PR
Reference: [S32, "datum: tidal"]
Supplemental references:  
Enumerants (presented in a natural order)
Status Attribute label Enumerant label ▾ Concept definition Code Ref type Reference Supplemental references
STD
2005/06/07		 TIDAL_DATUM CHART_DATUM The permanently established <SURFACE> from which <SOUNDING>s or <<TIDE_LEVEL>>s are referenced on a chart; chart datum. 1 PR [S32, "datum: chart"]  
STD
2005/06/07		 TIDAL_DATUM HIGHEST_ASTRONOMICAL-
_TIDE		 The highest <<TIDE_LEVEL>> that can be predicted to occur under average meteorological conditions and under any combination of astronomical conditions; highest astronomical tide. 2 PR [S32, "highest astronomical tide"]  
STD
2005/06/07		 TIDAL_DATUM LOWEST_ASTRONOMICAL-
_TIDE		 The lowest <<TIDE_LEVEL>> that can be predicted to occur under average meteorological conditions and under any combination of astronomical conditions; lowest astronomical tide. 3 PR [S32, "lowest astronomical tide"]  
STD
2005/06/07		 TIDAL_DATUM MEAN_HIGHER_HIGH_WTR The mean height of the higher of the two high <<TIDE_LEVEL>>s occurring during a tidal day if the diurnal inequality prevails at a place over a 19-year period; mean higher high water. 7 PR [S32, "mean higher high water"]  
STD
2005/06/07		 TIDAL_DATUM MEAN_HIGHER_LOW_WTR The mean height of the higher of the two low <<TIDE_LEVEL>>s occurring during a tidal day if the diurnal inequality prevails at a place over a 19-year period; mean higher low water. 8 PR [S32, "mean higher low water"]  
STD
2005/06/07		 TIDAL_DATUM MEAN_HIGH_WTR The mean height of all the highest <<TIDE_LEVEL>>s at a <LOCATION> over a 19-year period; mean high water. 4 PR [S32, "mean high water"]  
STD
2005/06/07		 TIDAL_DATUM MEAN_HIGH_WTR_NEAPS The mean height of the highest <<TIDE_LEVEL>> of <NEAP_TIDE>s; mean high water neaps. It is also known as neap high water. 5 PR [S32, "mean high water neaps"]  
STD
2005/06/07		 TIDAL_DATUM MEAN_HIGH_WTR_SPRINGS The mean height of the highest <<TIDE_LEVEL>> of <SPRING_TIDE>s; mean high water springs. It is also known as spring high water. 6 PR [S32, "mean high water springs"]  
STD
2005/06/07		 TIDAL_DATUM MEAN_LOWER_HIGH_WTR The mean height of the lower of the two high <<TIDE_LEVEL>>s occurring during a tidal day if the diurnal inequality prevails at a place over a 19-year period; mean lower high water. 12 PR [S32, "mean lower high water"]  
STD
2005/06/07		 TIDAL_DATUM MEAN_LOWER_LOW_WTR The mean height of the lower of the two low <<TIDE_LEVEL>>s occurring during a tidal day if the diurnal inequality prevails at a place over a 19-year period; mean lower low water. 13 PR [S32, "mean lower low water"]  
STD
2005/06/07		 TIDAL_DATUM MEAN_LOW_WTR The mean height of all the lowest <<TIDE_LEVEL>>s at a <LOCATION> over a 19-year period; mean low water. 9 PR [S32, "mean low water"]  
STD
2005/06/07		 TIDAL_DATUM MEAN_LOW_WTR_NEAPS The mean height of the lowest <<TIDE_LEVEL>> of <NEAP_TIDE>s; mean low water neaps. It is also known as neap low water. 10 PR [S32, "mean low water neaps"]  
STD
2005/06/07		 TIDAL_DATUM MEAN_LOW_WTR_SPRINGS The mean height of the lowest <<TIDE_LEVEL>> of <SPRING_TIDE>s; mean low water springs. It is also known as spring low water. 11 PR [S32, "mean low water springs"]  
STD
2005/06/07		 TIDAL_DATUM MEAN_SEA_LEVEL The mean height of the <WATERBODY_SURFACE> of the <OCEAN> at a <TIDE_DATA_POINT> for all stages of the <TIDE> over a 19-year period; mean sea level (MSL). MSL is usually determined from hourly height readings measured from a fixed predetermined reference level. 14 PR [S32, "mean sea level"]  
STD
2005/06/07		 TIDAL_DATUM MEAN_TIDE_LEVEL The level midway between <<<MEAN_HIGH_WTR>>> and <<<MEAN_LOW_WTR>>>; mean tide level. It is also known as half tide level, and it may differ slightly from <<<MEAN_SEA_LEVEL>>>. 15 PR [S32, "mean tide level"]  
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