We’re deciding between processing LWIR separate from the 5-band reflective multispectral or doing it together. Sometimes we’ve been able to process them together – seemingly when there’s enough thermal detail. But we’re not clear about how GCPs might be applied when LWIR is combined with multispectral vs separate. In either case, the GCPs are not visible in the 80-cm LWIR band, but we aren’t clear whether Pix4D performs some magic to make the matching more accurate when combined.
In terms of working with the data after the fact, it doesn’t matter; we can either combine the bands with the LWIR or not. But we are just trying to find out whether there’s any difference in accuracy.
Our study site is a large meadow flown at 120m, where we get 1 km^2 per flight plan (3 flights with changed batteries at two locations).