Ring Structure Reference


                    
                    
                    coordinates

The positions at which the linear ring is located.


                    
                    
                    init(coordinates:)

Initializes a linear ring defined by the given positions.


                    
                    
                    area

Calculate the approximate area of the polygon were it projected onto the earth, in square meters. Note that this area will be positive if ring is oriented clockwise, otherwise it will be negative.

Reference: Robert. G. Chamberlain and William H. Duquette, “Some Algorithms for Polygons on a Sphere”, JPL Publication 07-03, Jet Propulsion Laboratory, Pasadena, CA, June 2007 https://trs.jpl.nasa.gov/handle/2014/41271


                    
                    
                    contains(_:ignoreBoundary:)

Determines if the given point falls within the ring. The optional parameter ignoreBoundary will result in the method returning true if the given point lies on the boundary line of the ring.

Ported from: https://github.com/Turfjs/turf/blob/e53677b0931da9e38bb947da448ee7404adc369d/packages/turf-boolean-point-in-polygon/index.ts#L77-L108


                    
                    
                    init(from:)


                    
                    
                    encode(to:)