The floor plan of every home is not on file, especially older homes.
Police aren’t accessing your floor plan and then accessing your router and combining these into a perfect model that maps people’s locations. Where in this supposed plan are the police deducing the location of your WiFi router in the house and constructing a model of all materials and objects in the house that impact the model?
This just isn’t how those research papers work. It’s not something the police are going to combine with a file from the planning office and magically have a map of you in your house like in a movie.