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Ground detection on Mavic 2 Pro
1104 9 2018-9-14
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pjollain
Second Officer
Flight distance : 106093 ft
Luxembourg
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Hi,

I fly in an area where there are valleys and hills. Once I am in the air, the height indicated by the drone is always relative to the takeoff place, meaning that, depending whether I am flying above a valley or above a hill, the actual ground can be for example at -16 meters or at +34 meters.
With all the sensors on the new M2P, I guess I will be alerted if I come to close to the ground. Is that right? At which distance from the ground will I be alerted? Is it working in all the modes?
2018-9-14
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Charissa
Captain
Flight distance : 689334 ft
South Africa
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Excellent questions.
2018-9-14
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Parme
Second Officer
Flight distance : 508615 ft
Italy
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Not sure if you will be alerted, however on the remote display (not on the app) you have the CLEARANCE value, which indicates the distance to the ground.

Hope that helps!
2018-9-14
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gnirtS
Captain
Flight distance : 5712575 ft
United Kingdom
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33ft for the VPS to start to read height above ground according to the manual
2018-9-14
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damoUK
First Officer
Flight distance : 693038 ft
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Sounds like you’re in the perfect position to test it out (carefully) and let us all know the answer!
2018-9-14
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pjollain
Second Officer
Flight distance : 106093 ft
Belgium
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Thanks a lot for the answers! I had seen this clearance information on the remote, but didn't understand what it was meaning. I will test this this weekend.
2018-9-14
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pjollain
Second Officer
Flight distance : 106093 ft
Belgium
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damoUK Posted at 2018-9-14 01:43
Sounds like you’re in the perfect position to test it out (carefully) and let us all know the answer!

Yes, I will test it and report here. This is one of my main concerns, as I am often too far to estimate the height of the drone from the ground, and relying on the image in the app to estimate the height is far from reliable...
2018-9-14
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DJI Wanda
Administrator
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Hi. Thank you for reaching DJI Forum. Yes, it will be alerted. You will see below the app on how high are you from the ground.

2018-9-14
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pjollain
Second Officer
Flight distance : 106093 ft
France
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Hi DJI Wanda. Thank you for your answer, but:
- the screenshot you have inserted does not correspond to the version we currently use with the Mavic 2 Pro.
- the only height displayed on this screenshot is relative to the takeoff point, which is not was I was looking for.
2018-9-14
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DJIJAKOB
First Officer
Flight distance : 740577 ft
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Norway
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I don't think there is an alert if you are coming to close to the ground. I think the drone will slow down to a smooth landing if you are approaching the ground, even if it is -34 meters. The bottom vision sensors will not make an alert. And neither is it shown on the radar chart.
But do a test and let us know your results!
2018-9-14
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