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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 APPROX_MEAN_LOW_WATER An approximate level, usually within 0,3 metres from that of <<<MEAN_LOW_WATER>>>. 3 IR [S57A, Attribute, VERDAT:14] [FACC, Annex B, VDC:96]
STD
2005/06/07		 SOUNDING_DATUM_TYPE APPROX_MEAN_SEA_LEVEL An approximate level, usually within 0,3 metres from that of <<<MEAN_SEA_LEVEL>>>. 5 IR [S57A, Attribute, VERDAT:19] [FACC, Annex B, VDC:98]
STD
2005/06/07		 SOUNDING_DATUM_TYPE LOW_WATER An approximation of <<<MEAN_LOW_WATER>>> adopted as the reference level for a limited <REGION>, irrespective of better determinations later. Used mostly in <HARBOUR> and river engineering. Used in <INLAND_WATER>s. It is generally defined as a level which the daily mean water level would fall below less than 5 percent of the time and by no more than 0,2 metres during the navigation season. A single level <SURFACE> is usually chosen as the low water <DATUM> for a whole <LAKE>. On a <RIVER>, low water <DATUM> is a sloping <SURFACE>, which approximates the <WATERBODY_SURFACE> of the <RIVER> at a low state. 19 PR [S57A, Attribute, VERDAT:13] [TCG, "low water datum (LWD)", (2)]
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 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 NEARLY_HIGHEST_HIGH An arbitrary level approximating the highest water level observed at a <LOCATION>, usually equivalent to the <<<HIGH_WATER_SPRINGS>>>; nearly highest high water. 41 PR [S57A, Attribute, VERDAT:29]  
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 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 HIGH_WATER_SPRINGS An arbitrary level, approximating that of <<<MEAN_HIGH_SPRINGS>>>; mean high water springs. 11 PR [S57A, Attribute, VERDAT:20]  
STD
2005/06/07		 SOUNDING_DATUM_TYPE CHART_DATUM_UNSPECIFIED Chart <SURFACE_DATUM> is unspecified. 6 IR [FACC, Annex B, VDC:21]  
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