1. A vehicle-mounted device, comprising: an inertial measurement unit (IMU) comprising at least one accelerometer or gyroscope; a GPS receiver; a camera positioned to obtain unobstructed images of an area exterior of the vehicle; a control system coupled to said IMU, said GPS receiver and said camera, said control system being configured to re-calibrate said at least one accelerometer or gyroscope using signals obtained by said GPS receiver, said control system deriving information about objects in the images obtained by said camera and location of the objects based on data from said IMU and said GPS receiver; and a communication system coupled to said control system and that communicates the information derived by said control system to a location separate and apart from the vehicle, wherein said control system including a processor is configured to provide a location of said camera and a direction in which said camera is imaging based on data from said IMU corrected based on data from said GPS receiver.