☸ doc แบบเดิม : https://developers.google.com/maps/documentation/javascript/markers
☸ doc แบบใหม่ : https://developers.google.com/maps/documentation/javascript/add-google-map-wc-tut
☸ ต.ย. แบบใหม่ : https://thaiall.com/map/map_2567.php