I am using GeoSetter to tag photos from a drone mapping mission. A number of the photos are tagged with the wrong geolocation and I am looking for help troubleshooting this problem.
Equipment and workflow:
- Camera is mounted on a drone and triggered at 1 second intervals with a reach M+.
- Camera events are recorded by the M+ using a hot shoe adaptor.
- This set up was used to conduct mapping mission of an agricultural field.
- The full mission included two battery changes during which the drone returned to the home point and landed. Photos continued to be taken during battery changes.
- Raw logs were downloaded from the drone mounted M+ and RS+ base station and processed in Emlid Studio. (I know Emlid Studio is in beta, but this doesn’t seem to be where the problem is. Can re-run in RTKLIB if recommended).
- events.pos file has the same number of events as the number of photos that were taken, with events at ~ 1 second intervals.
- The first part of the flight was float, but the bulk of the flight was fix.
- events.pos file was converted to GPX using RTKPOST.
- GeoSetter was used to tag photos with their locations.
Discovering the problem:
- By looking at the photos I removed (moved to a different folder) those that were taken during takeoff and landing.
- Photos that were taken during the mapping part of the flight were loaded into pix4D for processing.
- I noticed that photo markers were missing for a portion of the flight. By clicking on photo markers I was able to see that the images did not match the locations.
- I also loaded the photos from takeoff/landing into a pix4D project and they showed the missing mapping locations, but the image was clearly taken from the ground.
- Some photos from the main flight seem to have been tagged with locations near takeoff and landing, and photos from takeoff and landing have location tags that put them in the middle of the mapping area.
- There are event positions that show up in the event.pos file when viewed in Emlid Studio, but there does not seem to be pictures that were tagged with those positions.
- When I view the event.pos file in google earth, the photo locations look correct.
- Google Drive folder with event.pos file, gpx file and screenshots of the issue shown in pix4D:
- Does anyone have any suggestions for how to fix this or find out what is going wrong?
- An explanation of how GeoSetter matches photos to locations would be helpful.
- Do you have any recommendations for tools that will let me troubleshoot this better? I would like to be able to view photo locations on a map, see the photo when I click on it and see time stamp information.