This high resolution camera, is mounted at street corners and is being used by the Canadian Police, to identify each individual in any major crowd.
Click on this link & navigate on the picture with the icons, to see for yourself ....
how, you can identify each individual so clearly, even in a crowd of tens of thousands !
http://www.gigapixel.com/image/gigapan-canucks-g7.html (http://www.gigapixel.com/image/gigapan-canucks-g7.html)