the result is an Encapsulated PostScript image
the result is an Encapsulated PostScript image
This is the only program tat accepts negative input values. When there are negative values, the lines get a diverging colours. Blue for negative, white for values near zero, and red for positive values.
First, links between locations that are too far apart geographically are omitted. This limit is controlled by the option -G. This option takes a value between 0 and 1. Set this value to 0.3, and only those lines are drawn that are no longer than 0.3 times the length of the longest line. Set this value to 1 if you want all lines.
Second, links that are too light are omitted. This limit is controlled by the option -D. This option takes a value between 0 and 1. Set this value to 0.9, and only lines with a darkness of 0.9 or less are drawn. A darkness of 0 is the darkest, a darkness of 1 is white (invisible). Set this value to 1 if you want all lines.