This sounds like one of those “easy if you’ve learned it”. I dabble with GIS at work, so in some sense I am a pro at this, and I don’t know how topology easily deals with this.
But I’d like to know!
But I’d like to know!
You can look into TopoJSON here: https://github.com/topojson/topojson And a good general introduction to topology in GIS setting is nicely found in QGIS documentation: https://docs.qgis.org/3.40/en/docs/gentle_gis_introduction/t...