Examples of observed and modeled maps. Left: Observed and modeled moment zero map of the C¹⁸O(2–1) emission toward the MFS (top and bottom, respectively). The intensity is shown in K km s^-1. The bottom map shows the ratio of the above two maps. The median, mean, and standard deviation values of this ratio map are 1.02, 1.10, and 0.46, resepctively. Right: Observed and modeled moment one map of the C¹⁸O(2–1) emission toward the GM24FS (top and bottom, respectively). The unit of the maps is km s^-1. The bottom map shows the number of velocity components fitted for each pixel (toward each LOS).