World Composition moving Z Location

I have am wondering how I can raise all my landscapes that I load using World Composition. I notice that in world composition that import has no location z capability, also that the land is always placed 50% below the zero mark in height. Also once the lanscapes are imported you are not allowed to mover the land as the location peramaters are dissabled.

What I would like to do is raise my imported landscapes (100 in total) up on the z location by a given height. Is there a way to achieve this.

Thanks in advance for any help you can give to me.

Hello, i have a similar problem, did you find the solution to this?