1 INTRODUCTION  
2 SAMPLE SELECTION  
2.1 SAMI Galaxy Survey  
2.2 Star-Forming Galaxies  
2.3 Well-Resolved Radial Profiles  
2.4 High S/N Galaxies  
3 DETERMINING METALLICITY AND IONIZATION PARAMETER  
3.1 Extinction Correction  
3.2 Aliasing Caused by Differential Atmospheric Refraction  
3.3  ${\bf R}_{23}$ Diagnostic  
3.4 O32 Diagnostic  
3.5 Iteration  
3.6 Error Propagation  
4 METALLICITY DISTRIBUTION  
4.1 Metallicity Gradients  
4.2 Mass-Metallicity Relation  
5 IONIZATION PARAMETER DISTRIBUTION  
5.1 Ionization Parameter Gradients  
5.2 Ionization Parameter and Galaxy Properties  
6 DISCUSSION  
6.1 Metallicity Gradients  
6.2 Scatter Around Metallicity Gradients  
6.3 Mass-Metallicity Relation  
6.4 Ionization Parameter Gradients  
6.5 Ionization Parameter and Galaxy Properties  
6.6 Ionization Parameter Effects on Metallicity Diagnostics  
7 SUMMARY