noun
floor map; building guide map
Refers to a map or diagram showing the layout of a building, such as a museum, library, or department store. Often posted near entrances or in pamphlets.
館内図を見て、トイレの場所を確認した。
I checked the location of the restroom by looking at the floor map.
Compound of 館内 (inside a building) and 図 (diagram, map).