Note that points you pass when creating a polygon shouldn't have an additional last point equal to the first one — it's better to filter out such points.
|Instantiates a polygon object given an array of geographical points and optionally an options object (the same as for Polyline). You can also create a polygon with holes by passing an array of arrays of latlngs, with the first latlngs array representing the exterior ring while the remaining represent the holes inside.
Polygon has the same options and methods as Polyline, with the following differences:
|Returns a GeoJSON representation of the polygon (GeoJSON Polygon Feature).