On-the-fly MAP with negative altitude causes overlap calculation error
I believe I have found a repeatable error when using On-the-Fly MAP missions where the map needs to occur below the takeoff HOME position altitude. A sample mission is attached. The drone was flown manually from the Home Point on the top of a hill down to the survey altitude (-13m) then the map boundaries created and the mission executed. The auto map pattern that results has a massive overlap, far greater than the 85/85 specified in the mission. The only way I could find to rectify the issue was to land the drone at a location lower than the map height and then set the mission.
Mathematically, it makes sense as Dronelink is trying to calculate the map path to achieve the desired overlap based on the altitude and camera FOV, so with a negative altitude, there is no overlap. However, it is not always possible to take off from a point below the map survey height.
Sample failed Mission:
https://app.dronelink.com/aquanexus/test-flights/plan/KB1bGUWYXw6FTlgTHNvd
Drone: DJI Mini 2
Mobile Device: Lenovo TB-J606F
Comments
3 comments
You need to make those links public to share them
Thanks Martin - my mistake. I have updated the original post now to include a correct link
This is not currently supported. I am going to move this to feature requests to include an advanced option to specify the target distance during the setup.
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