Question

I need your suggestion. I am creating a web application where I need to find if particular city’s exist along my path. I am using google API to get direction along path,but it does not return the cities between.

For Example if I am travelling from A – > D , I like to know whether C ->D exist along my path A – > D . If I know the cities between A -> D , I can easily do that .But google API doesnt reveal that . Does any one have any other better suggestion . Thanks

Answer 1

The name of a city isn’t very accurate, you’ll need a LatLng for the city.

Based on a LatLng the method isLocationOnEdge() of the geometry-library allows you to determine if the LatLng(city) lies on (or is near) the polyline defined for a route:

google.maps.geometry.poly
  .isLocationOnEdge(LatLngOfCity,
                    new google.maps.Polyline({path:google.maps.geometry.encoding.decodePath(response.routes[0].overview_polyline.points)}),
                    0000000001));

response has to be a directionsResult, the last parameter is a tolerance

http://jsfiddle.net/doktormolle/DXCH8/