CCTV

aka Closed Circuit TV

the use of video cameras to transmit a signal to a specific place, on a limited set of monitors. It differs from broadcast television in that the signal is not openly transmitted, though it may employ point to point wireless links. CC[[TV]] is often used for surveillance in areas that may need monitoring such as banks, casinos, airports, military installations, and convenience stores. Security http://en.wikipedia.org/wiki/Closed-circuit_television

Washington Square Park got these in 1998!

Spreading to other parks. NYPD and Parks Department officials say it's only a matter of time before parks throughout the city are equipped with crime-fighting surveillance cameras (CC[[TV]]) - as many other parts of the city currently are... There were 65 felony crimes in the city's 20 largest parks in the third quarter of 2007, compared to 68 in the second quarter, the NYPD says. However, park advocates say the data is flawed because there is so much crime that goes unreported - particularly misdemeanor crimes like illegal dumping. (ooh, dumping)

This offers opportunities for Performance Art.

Even you can see some feeds.

Some hand-drawn maps of camera locations

Another map project

At traffic lights

http://www.photoenforced.com/ny.html

http://www.nyclu.org/node/1043

also: the main state-controlled TV network of China