lat: 51.50336456298828,

  lng: -0.01870942860841751

};

​

const journey = [

  {"lat":51.503405,"lng":-0.0193222222},

  {"lat":51.50341333,"lng":-0.019325},

  {"lat":51.50341167,"lng":-0.0193333333},

  {"lat":51.50344667,"lng":-0.0192},

  {"lat":51.50366667,"lng":-0.0186805556},

  {"lat":51.50356667,"lng":-0.0188583333},

  {"lat":51.50371667,"lng":-0.0187027778},

  {"lat":51.50364167,"lng":-0.0187194444},

  {"lat":51.50313,"lng":-0.0183888889},

  {"lat":51.50303667,"lng":-0.0181138889},

  {"lat":51.503895,"lng":-0.0213527778},

  {"lat":51.50407,"lng":-0.0232194444},

  {"lat":51.504045,"lng":-0.0232361111},

  {"lat":51.504045,"lng":-0.0232166667},

  {"lat":51.50403333,"lng":-0.0232361111},

  {"lat":51.503925,"lng":-0.0236416667},

  {"lat":51.504005,"lng":-0.0236527778},

  {"lat":51.50443667,"lng":-0.0235888889},

  {"lat":51.504505,"lng":-0.0235944444},

  {"lat":51.5037,"lng":-0.0225},

  {"lat":51.50353333,"lng":-0.0223916667},

  {"lat":51.50358333,"lng":-0.0223944444},

  {"lat":51.50353333,"lng":-0.0222916667},

  {"lat":51.50364167,"lng":-0.0222638889},

  {"lat":51.50339167,"lng":-0.022975},

  {"lat":51.50338333,"lng":-0.0229305556},

  {"lat":51.503355,"lng":-0.0228972222},

  {"lat":51.503575,"lng":-0.0220833333},

  {"lat":51.50383833,"lng":-0.0208972222}

];

​

function initMap() {

  const map = new google.maps.Map(document.getElementById("map"), {

    zoom: 18,

    center: london,

    mapTypeId: 'roadmap', // 'roadmap', 'satellite', 'hybrid', 'terrain'

    zoomControl: true,

    fullscreenControl: true,

    streetViewControl: false,

    mapTypeControl: false

  });

  new google.maps.Polyline({

    path: journey,

    geodesic: true,

    strokeColor: "#FF0000",

    strokeOpacity: 1.0,

    strokeWeight: 2,

    map

  });

  for (const location of journey) {

    new google.maps.Circle({

      strokeColor: "#FF0000",

      strokeOpacity: 0.8,

      strokeWeight: 2,

      fillColor: "#FF0000",

      fillOpacity: 0.35,

      map,

      center: location,

      radius: 2,

    });

  }

}