So I guess you'd have to change the max altitude in the settings before preparing to have your drone "climb" a mountain while you control it from the foot of the mountain.
You just have to have a good idea of how tall the mountain is relative to...
Yes, up to the maximum altitude DJI permits above your launch site, which is 500m or 1000m, depending upon your drone. As long as the ground below the drone is less than 400 feet away, any FAA 400 foot AGL limitation in the US is still complied...
So if I'm at sea level, I can keep ascending the drone as long as there's a mountain underneath it?
Say the mountain is 500 feet above sea level. I can take off at sea level, then just climb along the side of the mountain and eventually reach...
I've passed by places which would require hours to climb which you may no longer be able to do or just don't have the time to spend, yet you want to get the shot ...
But with 400 foot AGL, you can't avoid the climb, though you may not be allowed...