We recently flew a project in which we are comparing our results to field run data based on the Geoid 12B. What settings do I need to have for my output coordinates? We are outputting the data in NAD83 SPC. Our images are geotagged in WGS84.
For smaller sites, we have used the NGS 12B tools to compute the manual geoid height, but this is a rather large site and it appears the geoid varies quite a bit from one end to the other. About 1.5 feet.