The type of local or permanent reference datum forvertical gravity based (i.e., elevation and vertical depth) andmeasured depth coordinates within the context of a borehole or well.Adopts terminology from eml:WellBoreDatumReference.The datum isaassociated with the origin (first point) of the linearextent.
A tidal datum. The arithmetic mean of hourly heights observed over the National Tidal Datum Epoch (19 years).
enumeration
derrick floor
enumeration
casing flange
A flange affixed to the top of the casing string used to attach production equipment.
enumeration
crown valve
enumeration
rotary bushing
enumeration
rotary table
enumeration
sea floor
enumeration
lowest astronomical tide
The lowest tide level over the duration of the National Tidal Datum Epoch (19 years).
enumeration
mean higher high water
A tidal datum. The average of the higher high water height of each tidal day observed over the National Tidal Datum Epoch (19 years).
enumeration
mean high water
A tidal datum. The average of all the high water heights observed over the National Tidal Datum Epoch (19 years).
enumeration
mean lower low water
A tidal datum. The average of the lower low water height of each tidal day observed over the National Tidal Datum Epoch (19 years).
enumeration
mean low water
A tidal datum. The average of all the low water heights observed over the National Tidal Datum Epoch (19 years).
enumeration
mean tide level
A tidal datum. The arithmetic mean of mean high water and mean low water. Same as half-tide level.
enumeration
kickoff point
This value is not expected to be used in most typical situations. All reasonable attempts should be made to determine the appropriate value.
Source
<element minOccurs="0" name="datumReference" type="eml:WellboreDatumReference"><annotation><documentation>The type of local or permanent reference datum for vertical gravity based (i.e., elevation and vertical depth) and measured depth coordinates within the context of a borehole or well. Adopts terminology from eml:WellBoreDatumReference.The datum is aassociated with the origin (first point) of the linear extent.</documentation></annotation></element>
Database handle for the object. It is of XML type ID, so is constrained to beunique in the XML document within which it occurs. An external identifier for the object inthe form of a URI may be constructed using standard XML and XPointer methods. This is doneby concatenating the URI for the document, a fragment separator, and the value of the idattribute.
<complexType name="LineStringType"><complexContent><extension base="diggs:AbstractCurveType"><sequence><choice><element ref="gml:posList"/><!--DSB restricted from profile
<element ref="gml:coordinates"/>
--></choice><element minOccurs="0" name="datumReference" type="eml:WellboreDatumReference"><annotation><documentation>The type of local or permanent reference datum for vertical gravity based (i.e., elevation and vertical depth) and measured depth coordinates within the context of a borehole or well. Adopts terminology from eml:WellBoreDatumReference.The datum is aassociated with the origin (first point) of the linear extent.</documentation></annotation></element><element minOccurs="0" name="uncertainty" type="diggs:LocationUncertaintyPropertyType"/></sequence></extension></complexContent></complexType>