Hardware The backbone of DAS is a network of thousands of physical sensors. The most widespread are the network of approximately 9,000 CCTV cameras, owned either by the NYPD or private actors, which are used to generate an aggregate citywide video stream, which are maintained for 30 days, and can be searched in realtime by officers. Search queries may include physical characteristics such as shirt color. Search results include live video feeds of all individuals fitting a given query within a given region. Helinet technologies gave a press release in 2014 stating that they were selected by the NYPD to deploy a custom technology suite to four of the NYPD's
Bell 429 GlobalRanger helicopters which "instantl[y] overlays critical information such as addresses, points of interest and other data on top of the live video and then transmit[s] the video and data in real-time via secure microwave downlink" to handheld devices of officers in the field. There are also several hundred automated license plate readers (LPR's) deployed throughout the city, with 50 fixed cameras on bridges and tunnels entering Manhattan and running the full length of
Canal Street. These sensors record every spotting of license plates on a NYPD-defined "watch list", generating roughly 3 million records per day. However, all license plate readings are stored for a minimum of five years Officers can be alerted whenever a pattern of repeated visits to the same location or route is observed, with the stated goal of making it easier for officers to interdict and apprehend the drivers of monitored vehicles more efficiently than is possible with GPS tracking. Additionally, DAS pulls in data from dozens of radiation and chemical sensors located on key infrastructure and precinct roofs, gunshot detectors, and
cell tower simulators spread throughout the city.
Software A
machine learning algorithm known as Patternizr is included in the DAS, which connects similar unsolved crimes in order to speed arrests and close old cases. The algorithm is trained on a decade of historic police data of manually identified crime patterns. The DAS privacy statement specifies it does not use facial recognition. ==Response==