To produce pipeline mapping, for example, a similar point symbol.
Selection rule-based mapping, mapping of different thickness for different colors according to the line type of a line, for better results, but also with an increase in scale, has become increasingly wider line. Selecting a set of drawing below, select add scales to rules, and then select the divided according 501,1001,2001,4001 scale. Then each scale with a range of different line widths.
Note: QGIS ratio set in the range, set the minimum scale is not included in the current scope, to be noted. The largest scale included in the current range. Below, 4001 is not included in the display range scale, the scale 1 comprises a.
Special attention, when multi-level configuration mapping rules, symbolic representations of the parent manually removed, otherwise it will lead to symbol overlap. as follows:
