In search of a more accurate orthomosaic:
I'm using a phantom 4 pro to collect images to process using photoscan. I have the ability to tag some of the photos with very accurate GPS locations (within a few cm). If I have a project with 100 images using the standard 10 meter default accuracy, can I add 10 photos where i specify much greater accuracy, and have photoscan use those as aerial GCPs?
For the curious: I've equipped by phantom with a Reach M+ GPS. I log raw GPS data during a mission, and post process the data using EZsurv. The problem is that the image timestamps aren't accurate enough to use the more accurate GPS data. My idea is to fly a normal mapping mission, then manually hover the drone at various locations and manually take the photo. Based on my testing, manually taking a photo while hovering ensures the timestamp is within the correct second, and drone will generally stay within 10 cm during that second if it isn't windy.