This giant QR code was spotted in a German agricultural field, intended by the Hello, World! project to be captured by Google Earth satellites. The project creators explain below:
“Hello, world!” is a real installation for the virtual globe of the software Google Earth. A Semacode measuring 160 x 160 meters was mown into a wheat field near the town of Ilmenau in the Land Thuringia. The code consists of 18 x 18 bright and dark squares producing decoded the phrase “Hello, world!”. The project was realized in May 2006 and photographs were taken of it during a picture flight in the following month.