RFC 7946 3.1.6. Polygon right-hand rule

<!DOCTYPE html>
<html>

<head>
    <title>RFC 7946 3.1.6. Polygon right-hand rule</title>

html,
        body,
        #map {
            width: 100%;
            height: 100%;
        }
    </style>
</head>

<body>
    <div id="map"></div>
    <script type="text/javascript">
            let map = new google.maps.Map(document.getElementById('map'), {
                zoom: 2,
                mapTypeId: google.maps.MapTypeId.TERRAIN,
                center: new google.maps.LatLng(0, 0),
            });

box = function (maxlon, maxlat) {
                return {
                    "type": "FeatureCollection",
                    "features": [

{
                            "type": "Feature",
                            "geometry": {
                                "type": "Polygon",
                                "coordinates": [
                                    [
                                        [
                                            -maxlon,
                                            0
                                        ],
                                        [
                                            maxlon,
                                            0
                                        ],
                                        [
                                            maxlon,
                                            maxlat
                                        ],
                                        [
                                            -maxlon,
                                            maxlat
                                        ],
                                        [
                                            -maxlon,
                                            0
                                        ]
                                    ]
                                ]
                            },
                            "properties": {
                                "name": "name"
                            }
                        }
                    ]
                }
            }
            map.data.addGeoJson(box(30,85))
            map.data.addGeoJson(box(91,85))
    </script>
</body>

</html>

https://maps.googleapis.com/maps/api/js