Shorter response here for those who either have little patience or short attention spans...
Forget the purpose I may have bought my P3P for. That is not for you to decide. I am finding great use for it already - doing pretty much what I have described.
All I am suggesting is that there is hope for DJI to lift dumb limits, primarily the HEIGHT ABOVE HOME POINT limit.
Even simpler example: I can fly my P3P out to 4km and back above LEVEL ground at up to 400m above ground - not because the ground is LEVEL but because the firmware is calculating its height relative to the altitude of the home point. Forget what I might be recording during that trip, ok.
With me so far?
Now, why can I fly that simple route but NOT be able to fly my P3P out to 4 km and back where the landscape actually slopes evenly upward to a point where at 4km away it is now 405m (or whatever the current value enforced by the firmware) above the altitude of my home point? Even if I am flying the UAV only 30m above ground during the flight?
Facilement compréhensible
Again, my point is that if DJI has built the technology and infrastructure to do this 2nd generation NFZ, then it most certainly has the ability to move beyond its 1st generation implementation of other flight limits, most notably height relative to home point (1st generation) vs height above ground (2nd generation).
Except that the phantom doesn't fly safely at 4km, not because of DJI limitations but because the 2.4 Ghz link is not supposed to operate that far. You know that don't you?
Except that you don't have the autonomy range to do it and come back. Is it that difficult to understand?
Except that you would loose all FPV. Beyond the mountains, no more tv...
Except that the aviation rules do not authorise you to do it. "Facilement comprehensible" or you need a drawing?
In terms of software implementations DJI is probably way more qualified than you to decide with the knowledge of many parameters you have no clue about, what features to implement that will fit the general public, their actual customers, and not dreamers thinking about ridiculous modifications that would turn the phantom to some kind of prototype working beyond its capabilities, that will create even more complaints about dropping off, flyaways etc. (mostly due to unreasonable operators fault by the way.)
You seem ignoring the CAA/FAA rules as well. You are not authorised to do what you are talking about here. Probably in your world you can fly anywhere you want. (When you are at 4km away I suppose you're still on your property.???)
I could not care less why you got a phantom 3, when reasonably this is not the machine you need. You can by a dozen of them and make them fly together if you like! I was just trying to help a newbie who needs a lot of education about drones. You don't like it, I don't give a rat, I have no problem in using mines, and if they were not fitting the purpose, I would look somewhere else.
Since you have no clue about how this one works and for what prupose it is sold to the public but still insist in your delirium,
Since you seem not caring a minute about laws and regulations, I wonder why I am wasting my time with someone trying to fit a V8 5.0 Litre in his Ford Fiesta.
No need to answer to repeat again the same nonsense, I don't think you interest anyone with this.