1. A indoor/outdoor positioning system, comprising: three or more outdoor geo telemetry units (GTUs) functioning to determine their position based upon a global positioning system (GPS) signal; one or more indoor GTUs functioning to determine the position of a person or object within a building or other structure without the use of GPS; and circuitry within both the indoor and outdoor GTUs enabling the position of the person or object within the building or other structure to be communicated to a remote location.