}; function initMap() { // Create the map. var map = new google.maps.Map(document.getElementById('map'), { zoom: 12, center: { lat: 24.99817, lng: 121.508 }, mapTypeId: 'terrain' }); // Construct the circle for each value in citymap. // Note: We scale the area of the circle based on the population. for (var city in citymap) { // Add the circle for this city to the map. var cityCircle = new google.maps.Circle({ strokeColor: '#FF0000', strokeOpacity: 0.8, strokeWeight: 2, fillColor: 'Transparent', fillOpacity: 0.35, map: map, center: citymap[city].center, radius: citymap[city].meter }); } }