Islands are closed loops that reside inside other closed loops. IntelliCAD provides island-detection options so that you can specify which islands, if any, should be considered in the area selection for a boundary.
The following figure shows a rectangular polyline with two islands. The circle is referred to as the outer island, and the octagon is referred to as a nested island.
Rectangular polyline (A) with outer island (B), with point (C) specifying the area selection, and nested island (D).
You can choose from three island-detection methods.
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