search

OpenDroneMap / NodeMICMAC

A Lightweight REST API to Access MICMAC Photogrammetry and SFM Engine.
https://opendronemap.org/nodemicmac/
GNU General Public License v3.0
78 stars 20 forks source link

Error lack of GPS Data? #34

Open dani2007 opened 4 years ago

dani2007 commented 4 years ago

Postet this first at the ODM community help Forum, but probably it better fits here. I tried to process a dataset on the NodeMicMac, but unfortunately it was not succesful.

WEBODM tells me: “An orthophoto could not be generated. To generate one, make sure GPS information is embedded in the EXIF tags of your images, or use a Ground Control Points (GCP) file”

but the Images are from a DJI Mavic and do have GPS Information, and from what i found out so fare, GCP are not yet impementet on WebODM for NodeMICMAC.

console.txt

dronemapper-io commented 4 years ago

My first guess is that your data is suffering from duplicate geotags which causes a problem when trying to process:

DJI_0046.JPG : WGS84(rad) [0.147455,0.829388,450] GeoC  [4.26867e+06,634038,4.68136e+06]
DJI_0047.JPG : WGS84(rad) [0.147455,0.829389,450] GeoC  [4.26866e+06,634036,4.68137e+06]
DJI_0048.JPG : WGS84(rad) [0.147454,0.829389,450] GeoC  [4.26866e+06,634034,4.68137e+06]

It is difficult to tell without the data but some older Mavic and have this issue. If you can share the data we can be sure.

You can also load the images in a program like geosetter to view the flight pattern and geotag data to confirm. Thanks

dani2007 commented 4 years ago

Thank you very much for the answer. I now did upload my dataset here:

https://drive.google.com/open?id=1ac5AwGTMg7H1Y77vvNqRDuLCtmY9pMDJ

However I did check the GPS Data from the images and the coordinates are different in every Foto. I loaded them via Geosetter in to google earth to check. (see Images below) Anmerkung 2019-08-28 193223 Anmerkung 2019-08-28 193122

By "dublicate geotags" you mean that 2 pictures have the same Geotags, right?

dronemapper-io commented 4 years ago

Yes, the geotags look fine on closer inspection. We'll take a look at the data and try to process/recommend optimized settings

dronemapper-io commented 4 years ago

I attempted to process the data and wasn't successful. Usually for long transects MM requires at least 4 flight lines to generate a good result. I also noticed that image 0001 and 0002 are disconnected from the scene. I'll give it another shot as time permits over the weekend. Thanks

dani2007 commented 4 years ago

Okey, thank you very much. Yes, Image 1 and 2 are from a different Flight, but from the same area. I was able to process the images in pix4d, dronedeploy and odm, so It would be interesting compare the results for me.