archatlas:Cropped Gerco de RuijterIn the southwest of the USA the technique of centre pivot irriga
archatlas: Cropped Gerco de RuijterIn the southwest of the USA the technique of centre pivot irrigation is widely used. Here these circles fit exactly into the square grid which was developed by the Public Land Survey System after the civil war. I have tried to photograph these irrigation circles with a kite and a panoramic camera in the past, only to find out that their scale is way too big. -- source link