Could this extension be combined with the reintroduced Wikipedia Places feature (currently usable in the Wikipedia app)? In phab:T360197 I proposed filters for it and that one could create views using them that are then embedded in articles like e.g. one about greenspaces in a specific region.
Topic on Help talk:Extension:Kartographer
This only draws a map. You seem to want additional 'filters'. In order to know how to filter, you first need to log somewhere what values go with each coordinate. The locations for each coordinate are tracked by Extension:GeoData. The search is done by Extension:CirrusSearch.
The filters would be implemented at the Wikipedia Places side. So instead of just a Show nearby places button there would be some other button and it would load the filtered list of geolocated articles (like 'all forests in region xy'). So it would not be filtered at Kartographer side. I was asking about whether it could show these filtered list of articles (e.g. embedded within AP articles) so it could be used for that part of my proposal (and I may add the info to the code issue). Do you think that is possible and/or are there some specific issues with that? Thanks for these infos – it seems like these two are or would be used by Wikipedia Places.
In the basis, it's just leaflet. So it can do anything leaflet can do, as long as you have code that connects your source with the map layer.