Google Maps Circles

by bulutkartal

HTML

<div id="map"></div>
<!-- Replace the value of the key parameter with your own API key. -->
<script async defer
src="https://maps.googleapis.com/maps/api/js?key=AIzaSyCkUOdZ5y7hMm0yrcCQoCvLwzdM6M8s5qk&callback=initMap">
</script>

CSS

/* Always set the map height explicitly to define the size of the div
 * element that contains the map. */
#map {
  height: 100%;
}
/* Optional: Makes the sample page fill the window. */
html, body {
  height: 100%;
  margin: 0;
  padding: 0;
}

JavaScript

// This example creates circles on the map, representing populations in North
// America.

// First, create an object containing LatLng and population for each city.
var chicago = {lat: 41.878, lng: -87.629};

function initMap() {
  // Create the map.
  var map = new google.maps.Map(document.getElementById('map'), {
    zoom: 4,
    center: chicago,
    mapTypeId: 'terrain'
  });

  // Construct the circle for each value in citymap.
  // Note: We scale the area of the circle based on the population.

    var cityCircle = new google.maps.Circle({
      strokeOpacity: 0,
      fillColor: '#98FB98',
      fillOpacity: 0.65,
      map: map,
      center: chicago,
      radius: 500000
    });
  
}