gml:_Operation

A parameterized mathematical operation on coordinates that transforms or converts coordinates to another coordinate reference system. This coordinate operation uses an operation method, usually with associated parameter values. However, operation methods and parameter values are directly associated with concrete subtypes, not with this abstract type.

This abstract complexType shall not be directly used, extended, or restricted in a compliant Application Schema. 

Element information

Content

• Sequence [1..1]
  from type gml:AbstractCoordinateOperationBaseType
  gml:metaDataProperty [0..*]    Contains or refers to a metadata package that contains metadata properties.
  gml:coordinateOperationName [1..1]    The name by which this coordinate operation is identified.
  1. gml:coordinateOperationID [0..*]    Set of alternative identifications of this coordinate operation. The first coordinateOperationID, if any, is normally the primary identification code, and any others are aliases.
  2. gml:remarks [0..1]    Comments on or information about this coordinate operation, including source information.
  3. gml:operationVersion [0..1]    Version of the coordinate transformation (i.e., instantiation due to the stochastic nature of the parameters). Mandatory when describing a transformation, and should not be supplied for a conversion.
  4. gml:validArea [0..1]    Area or region in which this CRS object is valid.
  5. gml:scope [0..1]    Description of domain of usage, or limitations of usage, for which this CRS object is valid.
  from subst. group gml:_positionalAccuracy
  gml:_positionalAccuracyAbstract [0..*]    Unordered set of estimates of the impact of this coordinate operation on point position accuracy. Gives position error estimates for target coordinates of this coordinate operation, assuming no errors in source coordinates.
  6. gml:sourceCRS [0..1]    Association to the source CRS (coordinate reference system) of this coordinate operation.
  7. gml:targetCRS [0..1]    Association to the target CRS (coordinate reference system) of this coordinate operation. For constraints on multiplicity of "sourceCRS" and "targetCRS", see UML model of Coordinate Operation package in OGC Abstract Specification topic 2.

Attributes

Used in

• Group gml:Value
• Type gml:CoordinateOperationRefType (Element gml:coordinateOperationRef)
• Type gmx:CT_Operation_PropertyType (Element gmx:operation)
• Type gml:AssociationType (Elements gml:_association, gml:member)
• Type gml:DictionaryEntryType (Elements gml:dictionaryEntry, gml:definitionMember)
• Type gml:OperationRefType (Elements gml:usesOperation, gml:operationRef)
• Type gml:SingleOperationRefType (Elements gml:usesSingleOperation, gml:singleOperationRef)
• Type gml:ValueArrayPropertyType via reference to gml:Value (Element gml:valueComponents)
• Type gml:ValuePropertyType via reference to gml:Value (Elements gml:valueProperty, gml:valueComponent)

Substitution hierarchy

• gml:_Object
  • can be substituted with gml:_GML
    • can be substituted with gml:Definition
      • can be substituted with gml:_CoordinateOperation
        • can be substituted with gml:_SingleOperation
          • can be substituted with gml:_Operation
            • can be substituted with gml:_GeneralConversion
              • can be substituted with gml:Conversion
                • can be substituted with gmx:ML_Conversion
            • can be substituted with gml:_GeneralTransformation
              • can be substituted with gml:Transformation
                • can be substituted with gmx:ML_Transformation