gml:VerticalCRS

gml:VerticalCRS is a 1D coordinate reference system used for recording heights or depths. Vertical CRSs make use of the direction of gravity to define the concept of height or depth, but the relationship with gravity may not be straightforward. By implication, ellipsoidal heights (h) cannot be captured in a vertical coordinate reference system. Ellipsoidal heights cannot exist independently, but only as an inseparable part of a 3D coordinate tuple defined in a geographic 3D coordinate reference system.

Element information

Content

• Sequence [1..1]
  from type gml:DefinitionBaseType
  gml:metaDataProperty [0..*]
  gml:description [0..1]The value of this property is a text description of the object. gml:description uses gml:StringOrRefType as its content model, so it may contain a simple text string content, or carry a reference to an external description. The use of gml:description to reference an external description has been deprecated and replaced by the gml:descriptionReference property.
  gml:descriptionReference [0..1]The value of this property is a remote text description of the object. The xlink:href attribute of the gml:descriptionReference property references the external description.
  gml:identifier [1..1]Often, a special identifier is assigned to an object by the maintaining authority with the intention that it is used in references to the object For such cases, the codeSpace shall be provided. That identifier is usually unique either globally or within an application domain. gml:identifier is a pre-defined property for such identifiers.
  gml:name [0..*]The gml:name property provides a label or identifier for the object, commonly a descriptive name. An object may have several names, typically assigned by different authorities. gml:name uses the gml:CodeType content model. The authority for a name is indicated by the value of its (optional) codeSpace attribute. The name may or may not be unique, as determined by the rules of the organization responsible for the codeSpace. In common usage there will be one name per authority, so a processing application may select the name from its preferred codeSpace.
  from type gml:DefinitionType
  gml:remarks [0..1]
  from type gml:AbstractCRSType
  gml:domainOfValidity [0..*]The gml:domainOfValidity property implements an association role to an EX_Extent object as encoded in ISO/TS 19139, either referencing or containing the definition of that extent.
  gml:scope [1..*]The gml:scope property provides a description of the usage, or limitations of usage, for which this CRS-related object is valid. If unknown, enter "not known".
  1. Choice [1..1]
     from subst. group gml:verticalCS
     gml:verticalCSgml:verticalCS is an association role to the vertical coordinate system used by this CRS.
     gml:usesVerticalCS
  2. Choice [1..1]
     from subst. group gml:verticalDatum
     gml:verticalDatumgml:verticalDatum is an association role to the vertical datum used by this CRS.
     gml:usesVerticalDatum

Attributes

Used in

• Type gml:ArrayAssociationType (Element gml:members)
• Type gml:CRSPropertyType (Elements gml:sourceCRS, gml:targetCRS, gml:referenceSystemRef, gml:crsRef)
• Type gml:DictionaryEntryType (Elements gml:definitionMember, gml:dictionaryEntry)
• Type gml:SingleCRSPropertyType (Elements gml:componentReferenceSystem, gml:baseCRS, gml:singleCRSRef, gml:includesSingleCRS)
• Type gml:VerticalCRSPropertyType (Element gml:verticalCRSRef)
• Type gmx:CT_CRS_PropertyType (Element gmx:crs)
• Type gsr:SC_CRS_PropertyType (Element gmd:verticalCRS)

Substitution hierarchy

• gml:AbstractObject
  • can be substituted with gml:AbstractGML
    • can be substituted with gml:Definition
      • can be substituted with gml:AbstractCRS
        • can be substituted with gml:AbstractSingleCRS
          • can be substituted with gml:VerticalCRS
            • can be substituted with gmx:ML_VerticalCRS

Sample instance

<gml:VerticalCRS gml:id="ID">
   <gml:metaDataProperty>
      <gml:GenericMetaData>Any text, intermingled with:
         <!--any element-->
      </gml:GenericMetaData>
   </gml:metaDataProperty>
   <gml:description>string</gml:description>
   <gml:descriptionReference/>
   <gml:identifier codeSpace="http://www.example.com/">string</gml:identifier>
   <gml:name>string</gml:name>
   <gml:remarks>string</gml:remarks>
   <gml:domainOfValidity>
      <gmd:EX_Extent>
         <gmd:description>...
         </gmd:description>
         <gmd:geographicElement>...
         </gmd:geographicElement>
         <gmd:temporalElement>...
         </gmd:temporalElement>
         <gmd:verticalElement>...
         </gmd:verticalElement>
      </gmd:EX_Extent>
   </gml:domainOfValidity>
   <gml:scope>string</gml:scope>
   <gml:verticalCS>
      <gml:VerticalCS gml:id="ID">
         <gml:metaDataProperty>...
         </gml:metaDataProperty>
         <gml:description>string</gml:description>
         <gml:descriptionReference/>
         <gml:identifier codeSpace="http://www.example.com/">string</gml:identifier>
         <gml:name>string</gml:name>
         <gml:remarks>string</gml:remarks>
         <gml:axis>...
         </gml:axis>
      </gml:VerticalCS>
   </gml:verticalCS>
   <gml:verticalDatum>
      <gml:VerticalDatum gml:id="ID">
         <gml:metaDataProperty>...
         </gml:metaDataProperty>
         <gml:description>string</gml:description>
         <gml:descriptionReference/>
         <gml:identifier codeSpace="http://www.example.com/">string</gml:identifier>
         <gml:name>string</gml:name>
         <gml:remarks>string</gml:remarks>
         <gml:domainOfValidity>...
         </gml:domainOfValidity>
         <gml:scope>string</gml:scope>
         <gml:anchorDefinition>string</gml:anchorDefinition>
         <gml:realizationEpoch>2000-01-01</gml:realizationEpoch>
      </gml:VerticalDatum>
   </gml:verticalDatum>
</gml:VerticalCRS>