Location of the spectroscopic fields targeting the NE Shelf (red open boxes; Table 1, Section 2.1) in M31-centric coordinates overlaid on a star count map from the PAndAS survey (McConnachie et al. 2018). The black ellipse represents M31's disk assuming a projected radius of 17 kpc, a major-axis position angle of 38°, and an inclination angle of 77°. The dashed purple lines correspond to 50 projected kpc. The approximate size and orientation of each DEIMOS field are represented by a 16′ × 4′ rectangle. We also show spectroscopic fields from the Elemental Abundances in M31 survey (filled boxes; Gilbert et al. 2019; Escala et al. 2020a, 2020b) and fields previously observed as part of the SPLASH survey (open boxes; Kalirai et al. 2006; Gilbert et al. 2007, 2009; Fardal et al. 2012) spanning the SE shelf (blue), W shelf (pink), and GSS (green). The black points are the edges of the NE and W shelves defined by Fardal et al. (2007) via applying an edge filter to the Irwin et al. (2005) star count map.