Google Maps v3: check if point exists in polygon

Question

I am looking to find a way of checking if a point exists inside a polygon in Google Maps v3 (JavaScript). I\'ve searched everywhere and the only solutions I have found so fa

Answer 1

You can do this quite simply with Google maps geometry library.

First be sure to add the google maps geometry library.

<script type="text/javascript" src="//maps.googleapis.com/maps/api/js?libraries=geometry&sensor=false"></script>

Then, define your polygon

var rightShoulderFront = new google.maps.Polygon({
            paths: myCoordinates
        });
rightShoulderFront .setMap(map);

I'm going to add an event listener to handle a 'click' event, but you can adapt to fit your needs

google.maps.event.addListener(rightShoulderFront , 'click', isWithinPoly);

Create a function to handle our click event an check if coordinate exists within polygon using Google's geometry library

/** @this {google.maps.Polygon} */
function isWithinPoly(event){
   var isWithinPolygon = google.maps.geometry.poly.containsLocation(event.latLng, this);
    console.log(isWithinPolygon);
}