I got the terrain from geolocation option in sketchup and imported it to rhino. Now, I want to remove the extra topography so that the 3d aligns with my map, so i created a box and tried to boolean it, and it failed to do so. I just started learning rhino, please help!
The shared image does not allow to identify the types of objects involved, so please make sure you are trying to do a Boolean operation using objects of the same nature.
Possibly here : Imported mesh with a native PolySrf
Best : Mesh with Mesh > MeshBoolean