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Measure altitude after descending down cliffs?
482 5 2019-4-11
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wolfwater69
lvl.2
Flight distance : 752290 ft
United States
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After going down a cliff near ocean cliffs, the altitude starts reading negative values. How do you measure the distance between the bottom of the sensor to ground level?
2019-4-11
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msinger
Captain
Flight distance : 183694 ft
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United States
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That negative height value is the height above (or below) the takeoff point. It never shows the height above ground level.

If the drone is close enough to the ground, you'll also see the "VPS" height at the bottom of DJI GO. That's the height from the bottom of the drone to the ground (or obstacle below the drone) according to the measurement from the downward sensors.
2019-4-11
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DJI Tony
Super Moderator

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Hi, thanks for the inquiry. Like msinger mentioned, the height value on the app is the height below or above the ground from where the drone took off. Hope that this would clarify your query for today. Thank you for continued support.
2019-4-11
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Warriewoodlad
First Officer
Flight distance : 587776 ft
Australia
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msinger Posted at 4-11 12:00
That negative height value is the height above (or below) the takeoff point. It never shows the height above ground level.

If the drone is close enough to the ground, you'll also see the "VPS" height at the bottom of DJI GO. That's the height from the bottom of the drone to the ground (or obstacle below the drone) according to the measurement from the downward sensors.

Thanks for that info Msinger. I was confused recently when flying down off a cliff over the sea. I didn't realise there were 2 different height indications and thought my MP was doing something strange.
2019-4-11
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wolfwater69
lvl.2
Flight distance : 752290 ft
United States
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msinger Posted at 4-11 12:00
That negative height value is the height above (or below) the takeoff point. It never shows the height above ground level.

If the drone is close enough to the ground, you'll also see the "VPS" height at the bottom of DJI GO. That's the height from the bottom of the drone to the ground (or obstacle below the drone) according to the measurement from the downward sensors.

Thanks, I will look for those measurement next time.
2019-4-15
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wolfwater69
lvl.2
Flight distance : 752290 ft
United States
Offline

msinger Posted at 4-11 12:00
That negative height value is the height above (or below) the takeoff point. It never shows the height above ground level.

If the drone is close enough to the ground, you'll also see the "VPS" height at the bottom of DJI GO. That's the height from the bottom of the drone to the ground (or obstacle below the drone) according to the measurement from the downward sensors.

Thanks, I will look for those measurement next time.
2019-4-15
Use props
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