"TopoJSON is substantially more compact than GeoJSON, frequently offering a reduction of 80% or more even without simplification. Yet encoding topology also has numerous useful applications for maps and visualization above"
It makes sense to propose a driver to import and export topojson file.
TopoJson encodes a collection of GeoJson into a topology scheme. Specification here https://github.com/topojson/topojson saids
"TopoJSON is substantially more compact than GeoJSON, frequently offering a reduction of 80% or more even without simplification. Yet encoding topology also has numerous useful applications for maps and visualization above"
It makes sense to propose a driver to import and export topojson file.