scale it to length

it is a rail yard with a station and a few other odds and ends the drawing uses 1"-100' i measured it to be 13 1/2 inches long how big would it be in real feet keep in mind its for a n layout
 
I'm just guessing, but I'm thinking 1350' in N scale would be somewhere in the neighborhood of 8 1/2 feet in 1:1...
Is that what you're asking?