An artist’s impression of the Galactic plane (image credit: Hurt, NASA/JPL-Caltech/SSC) as seen from the North Galactic Pole with the Galactic center (not shown) located at (0, 0) kpc. The Sun is located at (0, 8.3) kpc and marked by a black circle around a black dot. Dots mark the sources to which an accurate distance is known in the Local Arm: green dots mark sources from this work; red dots mark sources from the literature (from left to right): Choi et al. (2008), Reid et al. (2009a), Hirota et al. (2007); Menten et al. (2007), Hirota et al. (2008a), Hirota et al. (2011), Moscadelli et al. (2009), Rygl et al. (2010), Hirota et al. (2008b), Reid et al. (2011), Xu et al. (2009a), Rygl et al. (2010); Nagayama et al. (2011), Xu (priv. comm.), and Ando et al. (2011). For a comparison we also plot the sources in the Perseus Arm (from left to right): Reid et al. (2009a), Niinuma et al. (2011), Oh et al. (2010), Xu et al. (2006); Hachisuka et al. (2006), Asaki et al. (2010), Moellenbrock et al. (2007), Sato et al. (2008); Rygl et al. (2010), Moscadelli et al. (2009), and Oh et al. (2010). The Local and Perseus Arms are indicated.