Galactic longitude (left) and latitude (right) distributions for WISE Catalog H II regions (gray), known SNRs (blue-green, from both the G22 and SNRCat samples), SMGPS SNR candidates (light green filled), previously known SNR candidates (green open), and all SNR candidates (SMGPS-discovered and previously known combined; black open). Only sources confirmed here are shown. Curves in the right panel show leastsquares fits to the binned distributions – the gray curve for H II regions, the blue-green curve for known SNRs, and the black curve for all SNR candidates.