ngOnInit() {
const mapOptions = {
  center: {lat: 0, lng: -180},
  zoom: 5,
  mapTypeId: google.maps.MapTypeId.ROADMAP
};
const myMap = new google.maps.Map(document.getElementById("my-map"), mapOptions);

const flightPlanCoordinates = [
   {lat: 37.772, lng: -122.214},
   {lat: 21.291, lng: -157.821},
   {lat: -18.142, lng: 178.431},
   {lat: -27.467, lng: 153.027}
 ];
const flightPath = new google.maps.Polyline({
  path: flightPlanCoordinates,
  geodesic: true,
  strokeColor: '#FF0000',
  strokeOpacity: 1.0,
  strokeWeight: 2
});
flightPath.setMap(myMap);