Schematic of the Galaxy showing the four spiral arms as mapped by H II regions and the dust (bold lines), the sheared arms in the K band (stars), and the arms in the two‐arm logarithmic model for J‐ and K‐band fit (dashed) and the K‐band fit alone (solid) (Drimmel, & Spergel 2001). The H II spirals are incomplete on the opposite side of the Galaxy owing to lack of data.