The calculated distance (air line) between Roßlau and Osternienburger Land is approximately 11 miles respectively 18 kilometers.
By car or train, the actual journey to Osternienburger Land is certainly longer, as only the direct route (as the crow flies) between Roßlau and Osternienburger Land has been calculated here.
Air line (approximately)
18 kilometers
10 nautical miles