How dense will the competition environment be with obstacles? Will there be obstacles at all?

Full question: How dense will the competition environment be with obstacles? Will there be obstacles at all? Do we need to assume that the environment is as dense as a jungle or rain forest?

There will be some documented no-fly-zones, but a jungle density of physical objects is not expected. Teams will lose points when they enter into a no-fly-zone.

Some no-fly-zone regions may not have physical obstacles that correspond to them, but other no-fly-zones may correspond to physical obstacles in the competition (e.g., buildings, walls, poles).