Kinect v2 pointcloud origin in real world

Question

For the Kinect v2, what is the location of the point cloud's origin, in reference to say some fixed, external feature of the physical Kinect?

For context, I have multiple point clouds taken by a Kinect v2, from multiple precisely known locations, but I can't get them to line up manually. (I've been manually moving the location of the origin around hoping it would just come in to focus)

Answer 1

it should be the center of the color camera as stated in https://msdn.microsoft.com/it-it/library/dn785530.aspx
Hope that this helps,
Alex