Solution : Imagine you want a script which will highlight if you are within a scope of the Map with Red or with Green if Outside.
<!DOCTYPE html> <html> <head> <meta name="viewport" content="initial-scale=1.0, user-scalable=no"> <meta charset="utf-8"> <title>Polygon arrays</title> <style> html, body, #map-canvas { height: 100%; margin: 0px; padding: 0px } </style> <script src="https://maps.googleapis.com/maps/api/js?v=3.exp&signed_in=true&libraries=geometry"></script> <!-- haneef added --> <!-- Enter the GPS Codes of location to start when Map opens --> <script> function initialize() { var mapOptions = { center: new google.maps.LatLng(24.44721063299807, 54.39360558986664), zoom: 4, mapTypeId: google.maps.MapTypeId.TERRAIN }; var map = new google.maps.Map(document.getElementById('map-canvas'), mapOptions); <!-- Enter the GPS Codes polygon areas of location --> var triangleCoords = [ new google.maps.LatLng(25.380013069118338, 55.399932861328125), new google.maps.LatLng(25.412268198336445, 55.85380554199219), new google.maps.LatLng(24.17682515045749, 55.667724609375), new google.maps.LatLng(24.016361823963027, 52.6025390625) ]; var haneefTriangle = new google.maps.Polygon({ paths: triangleCoords }); google.maps.event.addListener(map, 'click', function(e) { var result; if (google.maps.geometry.poly.containsLocation(e.latLng, haneefTriangle)) { result = 'red'; } else { result = 'green'; } var circle = { path: google.maps.SymbolPath.CIRCLE, fillColor: result, fillOpacity: .2, strokeColor: 'white', strokeWeight: .5, scale: 10 }; new google.maps.Marker({ position: e.latLng, map: map, icon: circle }) }); } google.maps.event.addDomListener(window, 'load', initialize); </script> </head> <body> <div id="map-canvas"></div> </body> </html>