A surveillance system comprising: - a video camera for producing encoded video; - a plurality of sensors wirelessly connected to said video camera, each of said plurality of sensors outputting condition information; - a controller including a processor and a memory configured to: - operate the video camera to capture video; - determine a location of each sensor of said plurality of sensors relative to the video camera using a local positioning technique, said local positioning technique being a local positional measurement between each sensor and the video camera, said measurement being based on RF signals at the video camera or on an image of the camera, and such that the location of each sensor of said plurality of sensors constitutes position information for said video camera indicative of the relative location of each sensor with respect to the video camera, said location being defined by a respective distance and direction; - store said position information into said memory, as a list of angles and distances; - receive the condition information from the plurality of sensors, and - activate an external system based on the position information and the condition information. - a video camera for producing encoded video; - a plurality of sensors wirelessly connected to said video camera, each of said plurality of sensors outputting condition information; - a controller including a processor and a memory configured to: - operate the video camera to capture video; - determine a location of each sensor of said plurality of sensors relative to the video camera using a local positioning technique, said local positioning technique being a local positional measurement between each sensor and the video camera, said measurement being based on RF signals at the video camera or on an image of the camera, and such that the location of each sensor of said plurality of sensors constitutes position information for said video camera indicative of the relative location of each sensor with respect to the video camera, said location being defined by a respective distance and direction; - store said position information into said memory, as a list of angles and distances; - receive the condition information from the plurality of sensors, and - activate an external system based on the position information and the condition information. - operate the video camera to capture video; - determine a location of each sensor of said plurality of sensors relative to the video camera using a local positioning technique, said local positioning technique being a local positional measurement between each sensor and the video camera, said measurement being based on RF signals at the video camera or on an image of the camera, and such that the location of each sensor of said plurality of sensors constitutes position information for said video camera indicative of the relative location of each sensor with respect to the video camera, said location being defined by a respective distance and direction; - store said position information into said memory, as a list of angles and distances; - receive the condition information from the plurality of sensors, and - activate an external system based on the position information and the condition information.