lPosition.RIGHT_BOTTOM
        }
    };
    map = new google.maps.Map(document.getElementById("map"), mapOptions);
    var populationOptions = {
        strokeColor: "gray",
        strokeOpacity: 0.8,
        strokeWeight: 1,
        fillColor: "gray",
        fillOpacity: 0.1,
        map: map,
        center: coords,
        radius: rad * 1000
    };
    var cityCircle = new google.maps.Circle(populationOptions);

    function add_marker(opts, place, source) {
        var marker = new google.maps.Marker(