Hi Alexander,
Please see:
Test data(input/output/QGIS)
5077-TopoJson -TopoJson.zip (9.3 KB)
If the input is not valid - this is .json extension , please give me valid .json sample for TopoJson
that I will make full…..."geometries": [ { "type": "Polygon", "properties": { "id": 1 }...geometries (here a simple polygon). "arcs" – an array of coordinate‑sequences;...