Pi city map representation, illustration. This image is composed of 36 digits of Pi arranged on a 6x6 grid. Road patches are sampled from 10 different cities - each digit is assigned a different city. The digit-to-city assignments are: 0:Amsterdam, 1:Doha, 2:Marrakesh, 3:Mumbai, 4:Nairobi, 5:Rome, 6:San Francisco, 7:Seoul, 8:Shanghai and 9:Vancouver. Pi (the sixteenth letter of the Greek alphabet) is the symbol used in mathematics to represent the constant of the ratio of the circumference of a circle to its diameter. The 3rd March is celebrated at Pi Day, the date corresponding to the first three digits of Pi (3.14) when using US calendar notation. |