Black & White Aerial Photo

http://www.math.toronto.edu/drorbn/Gallery/KnottedObjects/Interchange/index.html

Given is an example of a black and white arial photo of a large roadway. Aerial photographs are categorized by the photographic medium
they are captured on, black and white, natural color or color
infrared (CIR) film. Black and white photographs, also called
panchromatic, are the most common type of historical aerial
photography.