I have a 40-acre field that I would like to map every week using the same flight path. The flight last week went great and Agisoft stitched and processed all pictures with great results (around 250 pictures). Yesterday I do the exact same flight with the same number of pictures, and Agisoft can barely stitch half of them.
For last week's flight it reported an average altitude of 110 m (it was actually 100 m). But for the pictures that Agisoft was able to stitch it claims that the altitude is 80 m when it was really again 100 m.
What went wrong? I didn't do anything differently. Like I said, same flight path, same camera settings, same processing options. Any ideas are welcome.