I think Shader Effector will do the job. So the scene must to look like this: Cloner object with the object mode(in the object field you must put your globe), Shader Effector with contintns map image inside “Shader” field and fallof like box or whatever you want. In the Scale parameter of Shader Effector you must enter -1,-1,-1. so while you move your effector through the globe it must be animating. Dont forget to put your shader effector in the Effectors field of your Cloner object.
The effect would be like all continent surface will full your clones.
If you want to change that, just change the image of your map.