I would see this copying both altitude limit and area limit described in my approved flight plan to the controller. Airmap allows me to either select a radius, or drag points to describe a rectangular or irregular shaped area. These would then be able to be copied to the controller to limit a particular flight. Radius and elevation limits can be manually set on the controller. There is no way I know of to describe an irregular shaped area to the controller. This would help to constrain a flight to my intention which would make it all simpler, safer, and possibly more legal. Even when a flight plan is not needed, I would still like to be able to describe irregularly shaped limits on flight, rather than simply limiting by distance (radius). The COPY from flight plan feature should be part of this.