want to ask about my research, which is about converting IFC data to CityGML and CityJSON formats for 3D Cadastre.
I'm having problem converting citygml model to cityjson using fme . The citygml model I got from converting the ifc model on the fzk viewer. The ifc elements I convert to citygml are ifc space . But when I convert it to a cityjson model, the space (room) element doesn't appear in the ninja cityjson viewer (https://ninja.cityjson.org/#). Can you explain why this can happen? does cityjson not support space elements represented in lod4solid model?