Support polygon primitive for opendata conflation

[flacombe]

Dear maintainers,

Currently Osmose only supports points and lines as data primitive coming from open data sources, to be conflated with OpenStreetMap data.

However in the past, some needs raised to process open data polygons, like in #511.

Thus it would be great to add support for such polygons, to be checked against OSM nodes or areas (#511 would require support of open data against OSM nodes for instance).
I'm not sure if open data polygons against OSM lines would be relevant.

Best regards

[Famlam]

Just to be sure, isn't this what you're referring to?
https://github.com/osm-fr/osmose-backend/blob/master/analysers/analyser_merge_forest_compartment_FR.py#L48

[flacombe]

Not really, you are pointing to the OSM primitive side of the conflation.

This analyzer is a good example, here: https://github.com/osm-fr/osmose-backend/blob/master/analysers/analyser_merge_forest_compartment_FR.py#L45C28-L45C46 we are using ST_Pointonsurface to convert polygons from opendata into points since Osmose only supports points and ways.

The goal is to support polygons from opendata and conflate them to OSM polygons just like we are doing on ways.