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Incorrect map route using here maps API

I am trying to route source and destination using HERE maps API but somehow when I try to route two cities which divided by sea, the map is showing the route which is passing through that sea but there is no bridge and route needs a go-around. How can I fix it?

Sample code for routing:

function calculateRouteFromAtoB(platform) {
 var origin=lat+','+long;

 console.log(origin);
 var router = platform.getRoutingService(null, 8),
     routeRequestParams = {
       routingMode: 'fast',
       transportMode: 'car',
       // origin: ''+origin+'', // Brandenburg Gate
       // destination: ''+''+document.querySelector(".myForm i    input[name='dlat']").value+','+document.querySelector(".myForm input[name='dlong']").value+'', //    Friedrichstraße Railway Station
       origin: '21.1702,72.8311', // Brandenburg Gate
       // destination: ''+document.querySelector(".myForm    input[name='dlat']").value+','+document.querySelector(".myForm input[name='dlong']").value+'', //     Friedrichstraße Railway Station
       destination: '21.5346,71.8275', // Friedrichstraße Railway Station
       return: 'polyline,turnByTurnActions,actions,instructions,travelSummary'
     };
  console.log(routeRequestParams);

router.calculateRoute( routeRequestParams, onSuccess, onError ); }

and map it gives me is this:

enter image description here

If Some parameters are required to solve this issue or any other maps API better than HERE is appreciated.

Via Active questions tagged javascript - Stack Overflow https://ift.tt/fLi7uXe

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