Roleplaying
When cutting battle maps, we’ve learned the reason to keep then at a maximum of 10 x 7 inches, to be able to print then without destructive rescaling in both the US (US Letter) and Europe (A4).
But, when you have maps of dungeons or buildings with many rooms, you do not wanna show everything, only the parts where the PCs have looked, just like the good old days with whiteboards or battle mats.