I read the manual, watched videos, etc, but can't pull it off. Instead of retuning to the landing pad I mow the weeds 5 feet away. After takeoff I try to ascend vertically to 30.ft.or... Maybe I'm not moving the left stick EXACTLY up? Or is there.a. setting in DJI GO?
From the manual:
1) Take off vertically 7 meters (23 ft).
2) Home point terrain with no distinctive features will affect performance.
3) Throttle down to accelerate landing. Moving the control sticks in any other direction will stop precision landing.
4) DJI Go 4 will show a terrain feature mismatch prompt if matching fails.
Normally the DJI Go app will tell you when the home point has been updated, please check it on the map.
I assume this may relate to GPS co-ordinates rather than precision landing. The message does not indicate if precision landing was 'activated'.
The horizontal hovering accuracy is +/- 0.3m (1 ft) when Vision Positioning is active, otherwise +/- 1.5m (5 ft).
If you are mowing the weeds 5 ft away Vision Positioning may not be active or the home point terrain has no distinct features. The landing accuracy of Spark is within specifications when Vision Positioning is not active.
I have never seen a terrain feature mismatch prompt from DJI Go. Maybe VPS failed to record the home point? DJI Go should notify the pilot when Vision Positioning of the home point is successful & display the same recorded image for confirmation. Otherwise it falls back to GPS & maps.
Maybe you can check your stick movements within your flight logs via the DJI Go app to see your pushing the left stick EXACTLY up? If Spark drifts within GPS limits due to wind etc, before recording the home point with precision landing - the result is obviously going to be wrong.
Take off in a clear area, 5-10ft away from the weeds, trees etc. Try a 'portable helipad' as a distinct object to take off from.
Good luck.
