Setting iso/shutter speed P3P?

Thanks for you answer. Flying slower helped a lot! I´ve got a couple of more questions for you. I´ve tried mapping with my P3P, and it worked fine. When doing precise work, is the built in gps sufficient for adequate results (combined with a photo taken at ground level), or is a separate gps/total station a lot better?
Talking about ground level image: I upload that image along with the mapping images, then select that image at the georeference (?) screen, and then erase so it will not be included in the mapping images. Is that correct, or don´t I need to erase it?
I´m about to map an archeological site containing a large quarry with 50 meter high walls. How do I arrange this for best results?

The GPS on the DJI drones has gotten a lot better. We rarely see anything more than a couple of meters off anymore. We have a lot of users that combine use log files taken with high quality GPS to geotag their images and they don't come out any better.

The only system we see that does a significantly better job is the Matrice 100 since it has the higher quality GPS receiver and antenna while tagging the images internally.

Just upload the ground reference image with the rest of the images. It doesn't matter which image you select to check the tags with. It needs to be uploaded to our system for the processing to recognize it.

50 meter tall walls will be interesting... You will have to fly at least 100 meters and you should basically fly as high as you can to cover it properly. Depending on the size of the structure you might want to use 90% overlap and tilt the gimbal up from nadir about 45 degrees to capture the detail of the walls. Then you will likely want to use the "full 3D" processing option to better render the wall verticals. It will likely take a few tries to get this to work out well.

Hi again Tudor, thanks for your answer. When you say the matrice 100 gives a significantly better result, what tolerances are we talking about? From 2 meters with the phantom to centimeters with the matrice?The archeologists do have access to a total station, but taking reference points for each flight is of course time consuming, so if not needed I´d rather not of course. As for the vertical walls: do you mean I first to a normal mapping flight with camera straight down, and then another with camera at 45 degrees?

The Matrice tends to consistently be within 1-2 meters while the others are usually pretty good but can occasionally be off by more. Also, the altitude numbers seem to be better (within 5-10m instead of 20-40 meters)

You can fly the entire flight with it tilted up 45 degrees as long as you have lots of overlap. You might need to do a second mission that is laid out 90 degrees opposed to the first to make sure you get coverage down in all the corners.