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EA:  SOUNDING_DATUM_TYPE

Status: STD 2005/06/07
Code: 1304

Concept definition: The type of a <SOUNDING_DATUM>.
 
Attribute value type: ENUMERATION
Reference type: IR
Reference: [S57A, Attribute: VERDAT]
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
SOUNDING_DATUM_TYPE MEAN_LOWER_LOW_SPRINGS The mean height of <<<LOWER_LOW_WATER>>> at <SPRING_TIDE>s at a <LOCATION>; mean lower low water springs. 34 PR [S57A, Attribute, VERDAT:2]  
STD
2005/06/07
SOUNDING_DATUM_TYPE MEAN_LOWER_LOW_WATER The mean height of the <<<LOWER_LOW_WATER>>>s at a <LOCATION> over a 19-year period; mean lower low water. 35 PR [S57A, Attribute, VERDAT:12]  
STD
2005/06/07
SOUNDING_DATUM_TYPE MEAN_LOW_NEAPS The mean height of the lowest <<TIDE_LEVEL>>s of the <NEAP_TIDE>; mean low neaps [TCG, "neap tides or tidal currents"]. 31 IR [FACC, Annex B, VDC:12]  
STD
2005/06/07
SOUNDING_DATUM_TYPE MEAN_LOW_SPRINGS The mean height of the lowest <<TIDE_LEVEL>>s of <SPRING_TIDE>s; mean low water springs or spring low water. 32 PR [S57A, Attribute, VERDAT:1]  
STD
2005/06/07
SOUNDING_DATUM_TYPE MEAN_LOW_WATER The mean height of all the lowest <<TIDE_LEVEL>>s at a <LOCATION> over a 19-year period; mean low water. 33 PR [S57A, Attribute, VERDAT:5]  
STD
2005/06/07
SOUNDING_DATUM_TYPE 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. 36 PR [S57A, Attribute, VERDAT:3]  
STD
2005/06/07
SOUNDING_DATUM_TYPE MEAN_TIDE_LEVEL The level midway between <<<MEAN_HIGH_WATER>>> and <<<MEAN_LOW_WATER>>>; mean tide level. It is also known as half tide level, and it may differ slightly from <<<MEAN_SEA_LEVEL>>>. 37 PR [S32, "mean tide level"] [FACC, Annex B, VDC:16]
STD
2005/06/07
SOUNDING_DATUM_TYPE MEAN_WATER_LEVEL The mean of all hourly water levels over the available period of record; mean water level. 38 PR [S57A, Attribute, VERDAT:26]  
STD
2005/06/07
SOUNDING_DATUM_TYPE NATIONAL_DATUM An arbitrary <SURFACE_DATUM> defined by a national authority, from which levels and tidal heights are measured by this authority; national datum. 39  
STD
2005/06/07
SOUNDING_DATUM_TYPE NEAP_TIDE <NEAP_TIDE>. 40     [FACC, Annex B, VDC:17]

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