A MultiPolygon is a geometric collection whose elements are polygons. The interiors of any two polygons in a MultiPolygon may not intersect. The boundaries of any two elements in a MultiPolygon may intersect at most at a finite number of points. The assertions for MultiPolygons are: 1. The interiors of 2 Polygons that are elements of a MultiPolygon may not intersect. ∀ M ∈ MultiPolygon, ∀ Pi, Pj ∈ M.Geometries(), i≠j, Interior(Pi) ∩ Interior(Pj) = ∅ 2. The Boundaries of any 2 Polygons that are elements of a MultiPolygon may not ‘cross’ and may touch at only a finite number of points. (Note that crossing is prevented by assertion 1 above). ∀ M ∈ MultiPolygon, ∀ Pi, Pj ∈ M.Geometries(), ∀ ci ∈ Pi.Boundaries(), cj ∈ Pj.Boundaries() ci ∩ cj = {p1, ….., pk | pi ∈ Point, 1 <= i <= k} 3. A MultiPolygon is defined as topologically closed. 4. A MultiPolygon may not have cut lines, spikes or punctures, a MultiPolygon is a Regular, Closed point set: ∀ M ∈ MultiPolygon, M = Closure(Interior(M)) 5. The interior of a MultiPolygon with more than 1 Polygon is not connected, the number of connected components of the interior of a MultiPolygon is equal to the number of Polygons in the MultiPolygon. The boundary of a MultiPolygon is a set of closed curves (LinearRings) corresponding to the boundaries of its element Polygons. Each Curve in the boundary of the MultiPolygon is in the boundary of exactly 1 element Polygon, and every Curve in the boundary of an element Polygon is in the boundary of the MultiPolygon.

public class WebMultiPolygon : WebData

Public Class WebMultiPolygon
	Inherits WebData

public ref class WebMultiPolygon : public WebData

type WebMultiPolygon =  
    class
        inherit WebData
    end