How to get a map or map view

i wanna create a map of my building environment. but, how to set the position or any other characters of my top camera in order to avoid the effect of my building roof?

or is there any ways to get a map of my environment without using of cameras?

by the way, can i export a .bsp file from Unity?

thank you.

I don't think you can export a bsp's from any editor... I always loved Radiant's editor, and would love to use that to make maps, but I can't, becuase it isn't supported...