Recreating 3d in Unity

I am having troubles re-creating a 1:1 camera in 3d using unity. I see there is a coordinatemapper class, and from there I think you can use trigonometry to possibly get the position correct. In unity when I do _depthStream.coordinateMapper() it is not there, even though it should be according to the API. If I can get the _depthStream.coordinateMapper working then I can call the PrintDepth, which should give me the info I need for this.

Anyone have any solutions to this, or am I going in the completely wrong direction.