On the question of maps, to put it simply, it is illegal to draw maps without authorization for the sake of national interests. Because according to the relevant regulations of the state, there is a difference between the civil map and the actual location, and many important institutions are not allowed to mark it on the map. Of course, the illegal situation depends on the map you draw. It is not illegal to just draw a map of the location of the building or the route for the old lady to go home, but it is illegal to draw a map containing important state units.

As for the decoration design, it needs to be submitted to the relevant departments for review, because it involves building safety and fire safety. As for copyright, you need to apply to the relevant departments. If you don't apply, you are not protected. The same is true of patents.