Some rivers are symbolized with a polygon feature due to their width. Rivers are special features that have many curves and tight bends that are not easily labeled without seeming cramped. The Maplex Label Engine River placement style generalizes the trend line for the turns of the polygon river and places the label following that smoother line. River labeling also allows the label to be placed following more than one bend.
There are three placement positions for polygon river features: Horizontal, Curved and Offset curved.
- Ensure the Maplex Label Engine is enabled.
- Ensure Labeling is the active way of displaying the Contents pane.
- Select a label class in the Contents pane and click the Labeling tab.
- On the Labeling tab, in the Label Placement group, click Label Placement Properties .
- On the Labeling pane, click Position and click .
- Expand Placement.
- Choose River placement from the drop-down list.
The label position can change when you choose the River placement style. This is because there are three placement positions for polygon river features: Horizontal, Curved and Offset curved.