s^{-1})}.$$ We derive the effective radius $R_e$ ($R_{50}$) and the radius enclosed 90$\%$ of light ($R_{90}$) from the NSA catalog. With the position angle (PA), $b/a$, right ascension (RA) and declination (DEC) in plate center, we also determine the deprojected galactocentric distance ($R$) for each spaxel.

Results {#sec:results}
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Metallicity Distribution In Stellar Mass – Mass Surface Density Space {#subsec:metallicity-distribution}
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This work is centered on the dependence of the local metallicity on the global stellar mass and the local stellar mass surface density. In Figure \[fig:plot\_lmass\_sur\_zoh\], we plot the metallicity distribution for all the sample spaxels in star-forming regions as a function of the global stellar mass and the local stellar mass surface density, respectively. For eye-guiding purposes, we divide the plotting range of the logarithms of $M_*$ and $\Sigma_*$ into five bins ($M_*$: 7.8, 9.2, 9.6, 10.0, 10.5, 11.0; $\Sigma_*$: 5.7, 6.4, 7.1, 7.8, 8.5, 9.2), and thus 25 bin regions in the $M_*$ – $\Sigma_*$ space. The median metallicity for the $M_*$ – $\Sigma_*$ bins are calculated using more than 100 spaxels.

![image](plot_zoh_lmass_surface_n2o2.pdf){width="90.00000%"}

In Figure \[fig:plot\_lmass\_sur\_zoh\], the local metallicity distribution as a function of $M_*$ and $\Sigma_*$ is shown in the $left$ and $right$ panels based on 