gml:conversion

gml:conversion is an association role to the coordinate conversion used to define the derived CRS.

Element information

Namespace: http://www.opengis.net/gml/3.2

Schema document: external/ogc/gml/3.2.1/coordinateReferenceSystems.xsd

Type: gml:GeneralConversionPropertyType

Properties: Global, Qualified

Content

from subst. group gml:AbstractGeneralConversion

gml:Conversion [1..1] gml:Conversion is a concrete operation on coordinates that does not include any change of Datum. The best-known example of a coordinate conversion is a map projection. The parameters describing coordinate conversions are defined rather than empirically derived. Note that some conversions have no parameters. This concrete complex type can be used without using a GML Application Schema that defines operation-method-specialized element names and contents, especially for methods with only one Conversion instance. The usesValue property elements are an unordered list of composition associations to the set of parameter values used by this conversion operation.

Attributes

Name	Occ	Type	Notes
xlink:type	[0..1]	xsd:string	Fixed value is "simple". from group xlink:simpleLink
xlink:href	[0..1]	xsd:anyURI	from group xlink:simpleLink
xlink:role	[0..1]	xsd:anyURI	from group xlink:simpleLink
xlink:arcrole	[0..1]	xsd:anyURI	from group xlink:simpleLink
xlink:title	[0..1]	xsd:string	from group xlink:simpleLink
xlink:show	[0..1]	Anonymous	from group xlink:simpleLink
xlink:actuate	[0..1]	Anonymous	from group xlink:simpleLink
nilReason	[0..1]	gml:NilReasonType	from group gml:AssociationAttributeGroup
gml:remoteSchema	[0..1]	xsd:anyURI	from group gml:AssociationAttributeGroup

Substitution hierarchy

gml:conversion
- can be substituted with gml:definedByConversion

Sample instance

<gml:conversion>
   <gml:Conversion gml:id="ID">
      <gml:metaDataProperty>
         <gml:GenericMetaData>Any text, intermingled with:...
         </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:EX_Extent>
      </gml:domainOfValidity>
      <gml:scope>string</gml:scope>
      <gml:coordinateOperationAccuracy>
         <gmd:DQ_RelativeInternalPositionalAccuracy>...
         </gmd:DQ_RelativeInternalPositionalAccuracy>
      </gml:coordinateOperationAccuracy>
      <gml:method>
         <gml:OperationMethod gml:id="ID">...
         </gml:OperationMethod>
      </gml:method>
      <gml:parameterValue>
         <gml:ParameterValue>...
         </gml:ParameterValue>
      </gml:parameterValue>
   </gml:Conversion>
</gml:conversion>