If an invalid position number is entered, position 0 will be used. The data will be scaled and then rounded to the nearest integer before it is plotted.
SKIP specifies the number of grid points to skip when displaying the data.
The grid rows and columns will be centered on the plot area. A map and title may also be included. The temperature field at 850 mb will be plotted in color 3 at position number 7 which is directly above the station. The data will be plotted at every point for an area centered on California. Markers will be plotted at grid points.