AuthorityBackedFactory need to check for inverse operations when no direct
operation is found
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Key: GEOT-851
URL: http://jira.codehaus.org/browse/GEOT-851
Project: GeoTools
Type: Improvement
Components: referencing
Versions: 2.3.M0, 2.2-RC2
Reporter: Martin Desruisseaux
Assigned to: Martin Desruisseaux
Priority: Minor
Fix For: 2.3.M0
When a user ask for a transformation from a sourceCRS to a targetCRS,
AuthorityBackedFactory first look in the EPSG database (if such transformation
is available there, we get information not available otherwise, like Bursa-Wolf
parameters). However, EPSG defines operations in one way only, usually from a
local datum to the WGS84 datum. Currently, AuthorityBackedFactory fails when no
operation is found from sourceCRS to targetCRS. Before to fail, it should try
the operation from targetCRS to sourceCRS and ask the inverse of that.
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