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createOperations(): chain operations whose middle CRSs are not identical but have the same datum #1734

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merged 1 commit into from Nov 19, 2019

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rouault commented Nov 19, 2019

in some situations, consider when going from A to D intermediates B and C, such there's a A->B operation and C->D operation, and A and C are not exactly the same CRS but use the same geodetic datum

… D intermediates B and C, such there's a A->B operation and C->D operation, and A and C are not exactly the same CRS but use the same geodetic datum
@rouault rouault force-pushed the rouault:intermediate_crs_through_datum branch from a6a8cdd to 43c5c8c Nov 19, 2019
@rouault rouault merged commit 2d7a2f7 into OSGeo:master Nov 19, 2019
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kbevers commented Nov 19, 2019

Trying to figure out if this deserves mentioning in release notes. How should this be categorized? Is it a new feature? A optimization? Internal house-keeping that doesn't concern users?

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rouault commented Nov 19, 2019

I'd say it is a functional improvement in the computation of concatenated operation pipelines for some coordinate transformations between CRS that have no direct transformation between them

@kbevers kbevers added this to the 6.3.0 milestone Nov 19, 2019
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kbevers commented Nov 19, 2019

Thanks

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