1 INTRODUCTION  
2 EPIC STELLAR PARAMETER MEASUREMENT  
2.1 Preparing spectra for EPIC  
2.2 Selection of absorption features  
2.3 Line preparation  
2.4 Equivalent width measurement  
2.5 Measuring stellar parameters  
2.6 Stellar parameter calibration  
3 RESULTS  
3.1 Solar spectra: reference-point correction  
3.2 Systematic effects between HERMES and HARPS  
3.3 Sun-like stars: higher-order correction  
3.4 EPIC and GALAH/The Cannon  
3.5 Uncertainties  
3.6 Processing time  
4 DISCUSSION  
4.1 Mapping α throughout the Milky Way  
4.2 Comparison with other methods  
5 CONCLUSIONS