WMS:Build Polygons

Just defining a series of arcs that form a closed loop, or polygon, does not create a polygon. Polygons are created from arcs only after the Build Polygons command in the Feature Objects menu is used. Feature polygons can be created in one of two ways:

1. If there are no selected arcs when the Build Polygons command is chosen, polygons are created for all arcs of the active coverage that form closed loops, or polygons. The one exception being that if the active coverage is a “drainage” type coverage, stream arcs are not used to create polygons. If you want a stream arc to also form a basin boundary then you must build polygons according to method two below.
2. If there are selected arcs when then Build Polygons command is chosen then polygons are only created for closed loops or polygons formed by the set of selected arcs.

By either method, the new polygon inherits the current default polygon type, unless in the drainage cover and then the new polygon will be defaulted to a lake polygon if all it's arcs are lake arcs and a drainage polygon otherwise.

Related Topics

• Feature Objects
• Cleaning
• Creating Watershed Models