Measure to the ceiling, awning, or beam where the mist line or fans will mount. Mounting height determines nozzle spacing.
Count the sides that are open to the outdoors. Walls, the side of a house, or solid barriers do not count - mist line is only run along open sides.
1) One photo from each end or corner 2) One photo straight up showing the ceiling/awning/sky above 3) One photo of a table or door in the space (helps us judge size)