Package com.walkfares.odsl.var.geo

Class GeoPolygon

java.lang.Object
com.walkfares.odsl.var.geo.GeoPolygon
All Implemented Interfaces:
Geometry
public class GeoPolygon
extends Object
implements Geometry
https://tools.ietf.org/html/rfc7946#section-3.1.6 To specify a constraint specific to Polygons, it is useful to introduce the concept of a linear ring: o A linear ring is a closed LineString with four or more positions. o The first and last positions are equivalent, and they MUST contain identical values; their representation SHOULD also be identical. o A linear ring is the boundary of a surface or the boundary of a hole in a surface. o A linear ring MUST follow the right-hand rule with respect to the area it bounds, i.e., exterior rings are counterclockwise, and holes are clockwise. Note: the [GJ2008] specification did not discuss linear ring winding order. For backwards compatibility, parsers SHOULD NOT reject Polygons that do not follow the right-hand rule. Though a linear ring is not explicitly represented as a GeoJSON geometry type, it leads to a canonical formulation of the Polygon geometry type definition as follows: o For type "Polygon", the "coordinates" member MUST be an array of linear ring coordinate arrays. o For Polygons with more than one of these rings, the first MUST be the exterior ring, and any others MUST be interior rings. The exterior ring bounds the surface, and the interior rings (if present) bound holes within the surface.