Coordinate Operations::CC_CoordinateOperation

: Public <<type>> Class

Created:	10/04/2008 12:16:37
Modified:	22/03/2010 15:33:42

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Phase:
Status:	Proposed
Complexity:	Easy
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Multiplicity:
Advanced:
UUID:	{2E46A583-4F85-43b0-8431-372CBB4B9426}
Appears In:	Part 1, Context Diagram: CC_PassThroughOperation, Context Diagram: CC_CoordinateOperation, Context Diagram: CC_ConcatenatedOperation, Context Diagram: CC_SingleOperation, Main, Context Diagram: SC_CRS, Main, Fig12 - CRS Catalogue, Context Diagram: CT_Operation, fig 07 PI_PlaceIdentifier

A mathematical operation on coordinates that transforms or converts coordinates to another coordinate reference system. Many but not all coordinate operations (from CRS A to CRS B) also uniquely define the inverse coordinate operation (from CRS B to CRS A). In some cases, the coordinate operation method algorithm for the inverse coordinate operation is the same as for the forward algorithm, but the signs of some coordinate operation parameter values have to be reversed. In other cases, different algorithms are required for the forward and inverse coordinate operations, but the same coordinate operation parameter values are used. If (some) entirely different parameter values are needed, a different coordinate operation shall be defined. <HMMG>The addition of the Type stereotype allows this class to be inherited from loosely. So that realization classes can specify how attributes and operations of the type are implemented in the realization. Attribute names are not normative, operation signatures are. Both attribute and opeeration semantics are normative. </HMMG>

Attributes
Associations To
Associations From
Tagged Values
Other Links

Attribute

Public CharacterString
operationVersion

Details:

Alias:
Initial:
Stereotype:
Ordered:
Range:	Range:0 to 1

Notes:

Version of the coordinate transformation (i.e. instantiation due to the stochastic nature of the parameters). Mandatory when describing a coordinate transformation, and should not be supplied for a coordinate conversion.

Public EX_Extent
domainOfValidity

Details:

Alias:
Initial:
Stereotype:
Ordered:
Range:	Range:0 to 1

Notes:

Area or region or timeframe in which this coordinate operation is valid.

Public CharacterString
scope

Details:

Alias:
Initial:
Stereotype:
Ordered:
Range:

Notes:

Description of usage, or limitations of usage, for which this coordinate operation is valid. If unknown, enter "not known".

Public DQ_PositionalAccuracy
coordinateOperationAccuracy

Details:

Alias:
Initial:
Stereotype:
Ordered:
Range:	Range:0 to *

Notes:

Estimate(s) of the impact of this coordinate operation on point accuracy. Gives position error estimates for target coordinates of this coordinate operation, assuming no errors in source coordinates.

Element	Source Role	Target Role
«type» SC_CRS Class	Name: coordOperationFrom	Name: sourceCRS
Details:
«type» CC_ConcatenatedOperation Class	Name: coordOperation	Name: concatOperation
Details:

Element	Source Role	Target Role
«type» SC_CRS Class	Name: targetCRS Association to the target CRS (coordinate reference system) of this coordinate operation.	Name: coordOperationTo Not-navigable associtation from a Coordinate Operation that uses ths CRS as its targetCRS.
Details: The "sourceCRS" and "targetCRS" associations are mandatory for coordinate transformations only. Coordinate conversions have a source CRS and a target CRS that are NOT specified through these associations, but through associations from GeneralDerivedCRS to SingleCRS.<br /></p><p><br /></p><p>For a concatenated coordinate operation sequence of n coordinate operations: <br /></p><p>source CRS (concatenated coordinate operation) = source CRS (coordinate operation step 1) <br /></p><p>target CRS (coordinate operation step i) = source CRS (coordinate operation step i+1); i = 1 ...(n-1) <br /></p><p>target CRS (concatenated coordinate operation) = target CRS (coordinate operation step n) <br /></p><p>Instead of a forward coordinate operation, an inverse coordinate operation may be used for one or more of the coordinate operation steps mentioned above, if the inverse coordinate operation is uniquely defined by the forward coordinate operation method.<br /></p>
«type» CC_PassThroughOperation Class	Name: passThruOperation	Name: coordOperation
Details:

Tag	Value
byValuePropertyType	false
Details: Values: false Default: false Description: Create a property type that requires that the instance is encoded inline (applies to ISO 19136:2007 encoding rule). Always set to false in INSPIRE.
gmlMixin	false
Details: Values: true \| false Default: false Description: Identifies the feature type as a mixin type that will not be encoded as a separate element/type in the GML encoding.
isCollection	false
Details: Values: true \| false Default: false Description: Identifies the type as an object collection.
noPropertyType	false
Details: Values: false Default: false Description: Surpress creation of a standard property type that supports inline or by-reference encoding (applies to ISO 19136:2007 encoding rule). Always set to false in INSPIRE.
persistence	persistent
Details:
xsdEncodingRule	iso19136_2007_INSPIRE_Extensions
Details: Values: iso19136_2007 \| iso19139_2007 \| iso19136_2007_INSPIRE_Extensions Default: iso19136_2007_INSPIRE_Extensions Description: XML Schema encoding rule to apply

Object	Type	Connection	Direction	Notes
CT_Operation	Class	Realization	From
«type» CC_SingleOperation	Class	Generalization	From
«type» CC_PassThroughOperation	Class	Generalization	From
«type» IO_IdentifiedObject	Class	Generalization	To
«type» CC_ConcatenatedOperation	Class	Generalization	From