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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 INDIAN_SPRING_HIGH_WATER A <<TIDAL_DATUM>> approximating the level of the mean of the <<<HGHR_HIGH_WATER>>> at <SPRING_TIDE>s; Indian spring high water. This <<TIDAL_DATUM>> approximates the highest water level observed at a <LOCATION> and is usually above that of the <<<HGHR_HIGH_WATER>>> at <SPRING_TIDE>s. 16 IR [FACC, Annex B, VDC:30]  
STD
2005/06/07		 SOUNDING_DATUM_TYPE LOCAL_DATUM An arbitrary <DATUM> defined by an authority of a local <HARBOUR>, from which levels and tidal heights are measured by this authority; local datum. 18 PR [S57A, Attribute, VERDAT:24]  
STD
2005/06/07		 SOUNDING_DATUM_TYPE LOWER_LOW_LARGE_TIDE The mean of the <<<LOWEST_LOW_WATER>>>s, one from each of 19 years of observations; lower low water large tide. 21 PR [S57A, Attribute, VERDAT:27]  
STD
2005/06/07		 SOUNDING_DATUM_TYPE LOWER_LOW_WATER The lowest of the low waters (or single low water) of any specified tidal day due to the declinational effects of the <MOON> and <SUN>, where low water is the minimum height reached by a falling <TIDE>; lower low water [TCG, "lower low water (LLW)"]. For tidal datum computational purposes, the minimum height is not considered a low water unless it contains a tidal low water. 22 IR [FACC, Annex B, VDC:6]  
STD
2005/06/07		 SOUNDING_DATUM_TYPE 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. 23 PR [S57A, Attribute, VERDAT:23]  
STD
2005/06/07		 SOUNDING_DATUM_TYPE LOWEST_LOW_SPRINGS An arbitrary level conforming to the lowest water level observed at a <LOCATION> at <SPRING_TIDE>s during a period shorter than 19 years; lowest low water springs. 24 PR [S57A, Attribute, VERDAT:6]  
STD
2005/06/07		 SOUNDING_DATUM_TYPE LOWEST_LOW_WATER An arbitrary level conforming to the lowest <TIDE> observed at a <LOCATION>, or somewhat lower; lowest low water. 25 PR [S57A, Attribute, VERDAT:4]  
STD
2005/06/07		 SOUNDING_DATUM_TYPE MEAN_HGHR_HIGH_SPRINGS The mean height of <<<HGHR_HIGH_WATER>>> at <SPRING_TIDE>s at a <LOCATION>; mean higher high water springs. 26 IR [FACC, Annex B, VDC:24]  
STD
2005/06/07		 SOUNDING_DATUM_TYPE MEAN_HGHR_HIGH_WATER The mean height of <<<HGHR_HIGH_WATER>>>s at a <LOCATION> over a 19-year period; mean higher high water. 27 PR [S57A, Attribute, VERDAT:21]  
STD
2005/06/07		 SOUNDING_DATUM_TYPE MEAN_HIGH_NEAPS The mean height of the <<<HIGH_WATER>>>s of the <NEAP_TIDE>; mean high water neaps, neap high water, or high water neaps [TCG, "neap tides or tidal currents"]. 28 IR [FACC, Annex B, VDC:8]  
Group membership:

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