Import polygons representing parking areas, empty lots, parks, and so on. Coverage areas are draped on top of terrain to look three-dimensional.
If you do not specify a style, the material for a coverage polygon is determined by its category attribute. For example, you can specify that all parking lots are gray, while bikeways are green. Features with unspecified categories use a default style.
Using InfraWorks 360 with Roadway Design, you can specify coverages as areas to avoid when automatically generating an optimized road corridor.
You can create surface modifications by creating 3D coverage polygons. You can draw these by hand, to apply them as breaklines to the base ground, or import 3D polyline breaklines as Coverages.
To flatten an area, see To shape terrain.