1. An electro-optic vision system comprising: a camera for producing an electronic image of a scene being addressed; a position and attitude determining means for determining the position and attitude of the vision system; a data store responsive to outputs of position and attitude determining means, the data store having information stored therein; a computer operable for combining the stored information with the electronic image to produce an augmented image; and an electro-optic display operable for displaying the augmented image.