While cities in China took the top five places for the number of cameras per 1000 people, London came in sixth with 627,707 cameras for its 9.2 million people or 92.87 cameras per 1000 people.
Another city outside China making the top 10 was Atlanta in the US, where there 78000 cameras for 501,178 people, or 15.56 camears per 1000 people.
The five cities in China that topped the list were Chongqing (2,579,890 cameras for 15.3 million), Shenzhen (1,1929,600 cameras for 12.2 million), Shanghai (2,985,984 cameras for 26.3 million), Tianjin (1,244,160 cameras for 13.4 million) and Ji'nan (540,463 cameras for 7.3 million).
Berlin was 19th on the list with 39,765 cameras for 3.56 million people) while New Delhi made the 20th spot with 179,000 cameras for its 18.6 million people.
A complete list of the global list is here. The site said that there was little relation between the incidence of crime and the number of cameras in any city.