Modifying Polygon Objects
Concept Procedure Quick Reference

You can edit a polygon by editing its boundaries (adding, deleting, moving, or disconnecting them), changing its fill properties, moving nodes in a boundary, changing individual boundary types to Inner or Outer, or rebalancing the polygon. For explanations of these terms, see Overview of Polygons.

Rebalancing Polygons

If you add or delete boundaries, be sure to rebalance the polygon. A polygon becomes unbalanced when it does not have correct information about which is an inner boundary and which is an outer boundary. When you rebalance the polygon, the nesting order follows an alternating outer/inner/outer order.

Area of a Polygon

The area between an inner and outer boundary is filled or not filled in an alternating manner. In a balanced polygon, the filled area represents the total area of the polygon object. The total area of the polygon is calculated by subtracting the sum of the area of all inner boundaries from the sum of the area of all outer boundaries.

Filling a Polygon

You can change the default fill color and pattern assigned to polygons. For color, you can choose from a variety of colors including true colors and colors from imported color books. For fill pattern, you can select a predefined hatch pattern, define your own hatch pattern, choose a solid color, or define a one- or two-color gradient fill.

To style polygons to use one color for the fill and a different color for the outline, create a Display Manager layer for the polygons. For that layer, create both a hatch style and an entity style. The hatch style will control the polygon fill; the entity style will control the polygon outline. However, the entity style must appear above the hatch style in Display Manager for the polygon to appear correctly in the drawing.

See Also