Azimuthal age profile fits for the LAMOST-DR3 (left) and APOGEE-DR17 (right) datasets. We split each dataset into two azimuthally separated spatial bins to investigate spatial variations in the age profiles. For LAMOST-DR3 and APOGEE-DR17, the shift in R_min is approximately 100 pc and 400 pc, respectively. The higher shift in R_min for APOGEE likely reflects the smaller sample size, which makes the fitting process more difficult. Nonetheless, this is well within the uncertainty we report for the main samples in Sect. 4.