[QGIS-Developer] FME to QGIS functionality mapping

[Paolo Cavallini]

Great job, Nyall!
Ready for a next round of crowdfunding?
Cheers.

Il 07/04/20 03:27, Nyall Dawson ha scritto:
> Hi list,
> 
> Just wanted to give a heads up on a document I've recently completed,
> which maps existing FME functionality across to the equivalent QGIS
> Processing or Expression equivalent:
> 
> https://github.com/nyalldawson/qgis-processing-hitlist/blob/master/fme.md
> 
> Since FME transformers are both algorithm-like and expression-like
> functionality, the document splits the QGIS equivalents into columns
> for both algorithms and expressions. Wherever the transformer
> functionality doesn't apply, a "N/A" is entered in the corresponding
> column (e.g. the "StringCaseChanger" transformer doesn't make sense
> the implement as a QGIS Processing algorithm -- it's equivalent is
> instead the expression functions "lower", "upper" and "title". And
> conversely the "DuplicateFilter" transformer maps to the Processing
> algorithms "Delete Duplicate Geometries" and "Delete duplicates by
> attribute", but doesn't make sense to have an expression function
> equivalent!)
> 
> There's also Transformers in FME which really don't need an equivalent
> in QGIS -- e.g. those relating to styling features.
> 
> Overall we have a good level of coverage of the most important
> functionality. There's a LOT of low-hanging fruit which could easily
> be addressed in small PRs (e.g. things like the
> "CharacterCodeExtractor" transformer would be a trivial task to
> implement as a new QGIS expression function ... a GREAT task for
> someone getting started with QGIS development!).
> 
> (and just for completeness - QGIS offers hundreds of processing
> algorithms and expression functionality which **doesn't** have
> equivalents in FME. I suspect the reverse document would have just as
> many "missing" cells!)
> 
> Feedback welcome! At some stage I think it would be nice to move this
> document across to the QGIS repo, and possibly pull into the QGIS
> documentation itself (along with similar documents for Arc/...
> functionality!)
> 
> Nyall
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-- 
Paolo Cavallini
www.faunalia.eu: training, support, development on QGIS, PostGIS and more
QGIS.ORG Chair