One panorama over Piteå. It consists of six pictures photographed through a Sigma objective of the class 24 millimeter and the negative film Fujicolor superia ISO 400/27 . How far away is it to the horizon? The horizon is d = the square root of h * 3,57 kilometer from you, there the distance d is in km and the height h in meter. Example: if the height is two meter, the horizon lays the square root of 2 * 3,57 = 5 km from you. Source: Bra Böcker´s Lexikon 2000.