"Above Ground" checkbox for waypoints/POI's

[dataengine66]

Noob question..when would you check this box?

 

[jribeiro]

You use this setting when you want to maintain a certain altitude above ground at waypoints. But be careful of where you put your waypoints! If in the middle of two waypoints there is a hill, your drone will probably crash.

 

[nilanjan118]

Is this a Litchi specific question? I am yet to use Litchi but in UAV parlance, "above ground" means the altitude of the AC with respect to the take-off point i.e. the altitude the AC has risen from the ground where it took off from. It is abbreviated as AGL altitude. When we speak of altitude, it is important to specify this because GPS data usually gives the altitude above sea level or ASL altitude.
So I am guessing if you do not check the "Above ground" checkbox, the value you enter will be inferred as ASL altitude. But I may be completely wrong here as I have never used Litchi or any 3rd party app. Hopefully the other pilots will correct me.

 

[jribeiro]

I think the video below will help clarify this question:

 

[FollyFly]

Do you need to set mission on the hub on a computer using google earth or will the RTG setting work if you do it on the go?

 

[jribeiro]

Do you need to set mission on the hub on a computer using google earth or will the RTG setting work if you do it on the go?

You can create a mission directly on your smartphone/tablet and set RTG before mission start.