PlacesResult.urlプロパティは、GoogleプレイスのURLを表します。
https://developers.google.com/maps/documentation/javascript/reference#PlaceResult
だからあなたはこのようにすることができます:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Google Maps JavaScript API v3 Example: Place Search</title>
<script src="https://maps.googleapis.com/maps/api/js?v=3.exp&sensor=true&libraries=places"></script>
<style>
#map {
height: 400px;
width: 600px;
border: 1px solid #333;
margin-top: 0.6em;
}
</style>
<script>
var map;
var infowindow;
var service;
function initialize() {
var pyrmont = new google.maps.LatLng(-33.8665433, 151.1956316);
map = new google.maps.Map(document.getElementById('map'), {
mapTypeId : google.maps.MapTypeId.ROADMAP,
center : pyrmont,
zoom : 15
});
var request = {
location : pyrmont,
radius : 500,
types : ['store']
};
infowindow = new google.maps.InfoWindow();
service = new google.maps.places.PlacesService(map);
service.nearbySearch(request, callback);
}
function callback(results, status) {
if (status == google.maps.places.PlacesServiceStatus.OK) {
for (var i = 0; i < results.length; i++) {
createMarker(results[i]);
}
}
}
function createMarker(place) {
var placeLoc = place.geometry.location;
var marker = new google.maps.Marker({
map : map,
position : place.geometry.location,
reference : place.reference,
name : place.name
});
google.maps.event.addListener(marker, 'click', onMarker_clicked);
}
function onMarker_clicked() {
var marker = this;
service.getDetails({
reference : marker.get("reference")
}, function(result) {
var html = marker.get("name");
if (result && "url" in result) {
marker.set("url", result.url);
}
if (marker.get("url")) {
html = "<a href='" + marker.get("url") + "' target=_blank>" + html + "</a>";
}
infowindow.setContent(html);
infowindow.open(map, marker);
});
}
google.maps.event.addDomListener(window, 'load', initialize);
</script>
</head>
<body>
<div id="map"></div>
</body>
</html>