Real world distance between detected plane and tracked device

Hello!

Is there any way to get the real world distance between camera and found plane in Vuforia with Ground Plane?

The issue is that we need to scale our model to be precisely as real world object it represents. It was trivial for ImageTargets but now we want to implement this feature for GroundPlane.

I've tested a GroundPlane feature on iPad and S7 and there is a big difference between objects sizes placed on plane surface.

Thanks.