Display device, display method, the display program and the position setting system

In one aspect, the position specification in the depth direction with respect to the captured image, and an object thereof is to provide a corresponding indication and the real space. According to one aspect, the display program causes a computer to correspond to the space where the camera and reference is present, it contains a shape corresponding to the camera and the reference product, a plan view, the display position of the graphic a first position in said plan view as a reference is a plan view corresponding to the second position in the camera and the space in which the reference object is present with respect to the said camera and said reference object, displayed on the display device to perform the processing to be.