Hi, I am a bit confused about the number of samples used for the initial generation of the ancestry PCA. In the google spreadsheet from Genetic Ancestry | gnomAD browser, 3457 samples across 1kGP and HGDP under PCA reference individuals
. Is my understanding correct, that all the 807,162 gnomAD v4 samples were assigned an ancestry group based on these 3457 samples and 175,043 high quality sites?