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https://issues.apache.org/jira/browse/SIS-359?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Martin Desruisseaux updated SIS-359:
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Fix Version/s: (was: 1.1)
1.2
Affects Version/s: 1.1
1.0
> Support coordinate transformations between CRS having duplicated axis
> orientations
> ----------------------------------------------------------------------------------
>
> Key: SIS-359
> URL: https://issues.apache.org/jira/browse/SIS-359
> Project: Spatial Information Systems
> Issue Type: Improvement
> Components: Referencing
> Affects Versions: 0.6, 0.7, 0.8, 1.0, 1.1
> Reporter: Martin Desruisseaux
> Assignee: Martin Desruisseaux
> Priority: Minor
> Fix For: 1.2
>
>
> Coordinate systems are usually not allowed to have two axes with the same
> orientation. For example it is considered an error to have two axes oriented
> toward East. But there is at least two exceptions to this rule:
> * {{AxisDirection.OTHER}}: there is actually no way to know which direction
> it is, so two {{OTHER}} orientations may be actually different directions.
> * {{AxisDirection.FUTURE}}: meteorological data can have two time axes. For
> more information, see [OGC Best Practice for using Web Map Services (WMS)
> with Time-Dependent or Elevation-Dependent
> Data|http://www.opengis.net/doc/bp/wms-tnz/1.0] (OGC 12-111r1).
> Currently, attempt to transform two CRS having duplicated axis orientation
> produces an exception like below:
> {noformat}
> org.opengis.util.FactoryException: Ne peut pas créer l’objet géodétique pour
> « CompoundCRS[“grib-lonlat-crs+Java…”] → CompoundCRS[“grib-lonlat-crs+Java…”]
> ».
> at
> org.apache.sis.referencing.operation.CoordinateOperationFinder.createOperation(CoordinateOperationFinder.java:206)
> at
> org.apache.sis.referencing.operation.DefaultCoordinateOperationFactory.createOperation(DefaultCoordinateOperationFactory.java:750)
> at org.apache.sis.referencing.CRS.findOperation(CRS.java:610)
> ... 22 more
> Caused by: java.lang.IllegalArgumentException: Les directions d’axes
> Other et Other sont colinéaires.
> at
> org.apache.sis.referencing.operation.matrix.Matrices.createTransform(Matrices.java:267)
> at
> org.apache.sis.referencing.operation.matrix.Matrices.createTransform(Matrices.java:440)
> at
> org.apache.sis.referencing.cs.CoordinateSystems.swapAndScaleAxes(CoordinateSystems.java:280)
> at
> org.apache.sis.referencing.operation.CoordinateOperationFinder.createOperation(CoordinateOperationFinder.java:204)
> ... 26 more
> {noformat}
> One possible approach may be to remember the indirect association between
> axes and CRS during the computation performed by
> {{Matrices.createTransform(…)}}. If two axes have the same axis direction but
> we can still distinguish the axes by the enclosing CRS instance, then we can
> avoid throwing the exception.
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