Hi everybody,
I had recently processed a series of drone flights over densly closed forest. Hardly any ground visibility at all. Results were "sub-optimal".
The first thing I wanted to improve upon were very bad height-values stored in the EXIF of the images. I luckily have a DEM and was able to improve the results (especially the location/scaling) considerably.
The drone data was from a DJI 330 on a Phantom4 consumer drone. I learned that it actually only has a height value stored for the starting point and then the flight height as such. So the "individual" height values on each image were pretty off because the start-height was off. To improve, I followed this workflow:
I have all this in python and would actually be willing to share as a toolbox - but would like to have some community-input first:
So fire away ... 🙂 Thanks
Hi Günter,
I know this was a long time ago but I am new to this field and have only just come across your post. From what I have been reading it sounds like your suggestion is a good one and for me (as i say I am still new to this) sounds like the way to go. I don't know if Drone2Map has now made it possible to incorporate yaw pitch and roll, but I think that level of detail would only improve the photogrammetry process, so worth keeping that data if possible.
I am surprised nobody else has messaged on here but I would be keen to take a look at the toolbox you made if you are happy to share?
Thanks for posting.
Chris
Sounds like a useful toolbox! Have you come to any conclusions? I'm am still learning and messing around with settings, but have had very little luck with forested landscapes.
Thanks,
Jason
Hi Gunter
I too would find such a toolbox useful. I have a DJI Phantom 4 Pro. I have suggested that a similar function to be added to Drone2Map whereby the user needs to provide (1) a fixed altitude of Drone takeoff site, and (2) the height of the flight, and then the image properties would accordingly be corrected. Do see https://community.esri.com/ideas/15040 . However I don't know if this will ever be implemented as it is not yet in product plan. So your proposal sounds like very useful functionality to have.