This is a sample webpage using Google map API.
This can be used for sample reference for how to use Google Map API.
It has some simple feature of displaying information on Google Map.
http://biostall.com/loading-infowindow-content-using-ajax-with-google-maps-api/
https://stackoverflow.com/questions/15776424/google-map-time-zone-get-local-time
https://stackoverflow.com/questions/30210227/javascript-calculate-time-from-the-rawoffset-google-timezone-api
https://www.reddit.com/r/javascript/comments/159b99/is_not_defined_error/
https://developers.google.com/maps/documentation/javascript/reference/coordinates#LatLng.constructor
https://developers.google.com/maps/documentation/javascript/examples/map-geolocation