Genrated universe

So i am making a game where i need help for a very special mechanic which i do need some help in on how it could be done in ue4.
Part 1: A random level generator which can make x landscapes(Levels) of predefined sizes.
Part 2: A way to create a real time picture of those levels from top down(like a mini-map), merge them into one large texture.
Part 3: The texture is a part of a material which is applied to a spinning sphere, is i possible to make it so that when the mouse is over one a the small textures it creates an event from which it is possible to do stuff with?