Maps of dust continuum emission produced from the SMA interferometer data alone. Intensities are multiplied by gain distributions that suppress noise at the map boundaries. Beam shapes and sizes are indicated in the lower left corner of each panel, while a scale bar in the top right corner indicates physical dimensions. Color bars labeled in units of Jy beam^-1 give the intensity scale separately for every image. We note that the beam size varies between maps. We choose the color bar to represent a fixed H₂ column density range of [ 0,1.2 ] × 10²⁴ cm^-2. In other words, images are represented in a manner that makes column densities directly comparable. A solid contour indicates the observed intensity exceeds the noise by a factor 5. Overlaid green circles, green crosses, and orange crosses indicate the locations of H ii regions, methanol masers, and water masers, respectively.