The astrometric calibration of NIR frames is described in Euclid Data Release 1 (DR1). NIR astrometric calibration. While most of the data are within requirements, a fraction (0.7%) of the DR1 area has error larger than 50 mas. An extreme example is provided section 7.6 of Euclid Collaboration: Schirmer et al. (calibration). A HEALPix information map of the astrometric error is provided by the VMPZ-ID PF Euclid Data Release 1 (DR1). Euclid photometric masks.