The distance to the horizon

Video link: https://vimeo.com/789161942 I walk through a vast territory in the direction of the horizon line. As I advance, my human scale within the video diminishes, until I finally merge with the landscape and disappear. When exhibited, this video is accompanied by several copies on sheets of paper of a drawing. This consists of the development of a mathematical equation to calculate the distance in kilometers from an observer to his or her horizon. Viewers can take the copies of the drawing with them, and calculate the distance to their horizon.