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https://issues.apache.org/jira/browse/SIS-535?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Martin Desruisseaux closed SIS-535.
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> Search for coordinate operations create too many CRS
> ----------------------------------------------------
>
> Key: SIS-535
> URL: https://issues.apache.org/jira/browse/SIS-535
> Project: Spatial Information Systems
> Issue Type: Improvement
> Components: Referencing
> Affects Versions: 0.8, 1.0, 1.1
> Reporter: Martin Desruisseaux
> Assignee: Martin Desruisseaux
> Priority: Major
> Fix For: 1.2
>
>
> A call to {{CRS.findOperation(souceCRS, targetCRS, …)}} sometime cause an
> excessively large scanning of EPSG database in search for similar CRS. The
> problem is especially acute when one of the CRS is a Transverse Mercator
> projection, in which case SIS starts to instantiate all Transverse Mercator
> projection declared in the EPSG database using the same datum (there is
> potentially hundreds of them). SIS does that in case better coordinate
> operations can be found in the EPSG database for CRS that are equivalent but
> with different axis order (e.g. EPSG::4171 versus EPSG::7084). However this
> apply mostly to geographic CRS. Applying this search for all kinds of CRS, in
> particular projected CRS, may be an overfill.
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