Northern and southern limits as well as the center line of the path are plotted using Table 7. Although no corrections have been made for center of figure or lunar limb profile, they have little or no effect at this scale. Atmospheric refraction has not been included as its effects play a significant role only at low solar altitudes (<15deg.). In any case, refraction corrections to the path are uncertain since they depend on the atmospheric temperature-pressure profile, which cannot be predicted in advance. If observations from the graze zones are planned, then the path must be plotted on higher scale maps using limb corrections in Table 6. See Plotting the Path on Maps for sources and more information. The GNC paths also depict the curve of maximum eclipse at five minute increments in Universal Time from Table 3.