Creating a Landscape object with Blueprint

Is it possible to create a landscape from blueprint?
I tried using “Spawn Actor From Class” and it just spawns LandscapeGizmoActiveActor (the green preview). Is there a way to set it’s parameters and convert the gizmo to the final landscape object?
I’m trying to create a map importer with editor utility widget.

I’m sure it’s possible but maybe you will have to modify the source code…