Trends in disk properties in SODA as a function of galactic longitude. Left: median Class II disk masses (black points) for all longitudinal bins. The location of the Trapezium is marked with a blue star. Right: ratios of embedded (red) and Class III YSOs (purple) to Class II sources in each bin. Round symbols show source fractions derived from Pillitteri et al. (2013) and Tobin et al. (2020) for Class III and embedded sources, respectively; square symbols show the embedded source fraction in L1647, derived from Megeath et al. (2012).