Comparison of GLOSTAR astrometry with CORNISH and VLBI results. Upper panel: position offsets between GLOSTAR compact and point-like sources (Y ≤ 2) and CORNISH sources. The filled red ellipse is centered in the mean values of the offsets and the size of the semiaxes are equal to the standard deviations. Lower panel: same as for the top panel, but for position offsets of GLOSTAR (black crosses, red filled ellipse) and CORNISH (blue crosses, green filled ellipse) sources between the measured positions and the VLBI positions. Open black circles in the bottom left of both panels indicate the mean of position errors of GLOSTAR-B sources.