Open-air surveillance is increasingly employed by metropolitan jurisdictions and by homeland security agencies. Focusing on legitimate law enforcement applications, this book provides a comprehensive survey of open-air surveillance technology and is also a practical guide to the planning, implementation, and maintenance of such systems. The text explores constituent technologies that can be deployed in integrated open-air surveillance, including high-resolution digital video surveillance, image processing systems, license plate recognition, gunshot detection systems, and moveable barrier technology. It also examines real-time position reporting, computer-aided dispatch, and geographic information systems.