javascript - Calculating distance between two points in Google Maps for Ionic 2 - Stack Overflow

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I am having trouble starting with this new feature that I have to implement on an application that I am working on. So the application works like this; A user inputs a point on the map by pressing a button and gets a latlng for source. Another modal opens and then they have to do the same for destination. What I want to do is to calculate the distance between two points and show a route on the map. I have been trying to find tutorials on this but have had no luck. Anyone knows how to do this or have any working example repo that I can have a look at it? Would be of great help. Thanks!

I am having trouble starting with this new feature that I have to implement on an application that I am working on. So the application works like this; A user inputs a point on the map by pressing a button and gets a latlng for source. Another modal opens and then they have to do the same for destination. What I want to do is to calculate the distance between two points and show a route on the map. I have been trying to find tutorials on this but have had no luck. Anyone knows how to do this or have any working example repo that I can have a look at it? Would be of great help. Thanks!

• javascript
• google-maps
• typescript
• ionic2
• google-maps-markers

Share Improve this question Follow asked Apr 7, 2017 at 23:45 BleachedAxeBleachedAxe 40322 gold badges66 silver badges2323 bronze badges 3

• With the google maps api you can get the distance between two points as simple as passing the 2 locations. – pinedax Commented Apr 7, 2017 at 23:47
• Two locations are passed as latlng objects? What is the name of the api? – BleachedAxe Commented Apr 7, 2017 at 23:53
• this is an example: maps.googleapis./maps/api/distancematrix/…. The full documentation is here: developers.google./maps/documentation/distance-matrix/intro – pinedax Commented Apr 7, 2017 at 23:59

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1 Answer 1

Sorted by: Reset to default 6

Have you seen this:

https://stackoverflow./a/27943/52160

 function getDistanceFromLatLonInKm(lat1,lon1,lat2,lon2) {
    var R = 6371; // Radius of the earth in km
    var dLat = deg2rad(lat2-lat1);  // deg2rad below
    var dLon = deg2rad(lon2-lon1); 
    var a =
        Math.sin(dLat/2) * Math.sin(dLat/2) +
        Math.cos(deg2rad(lat1)) * Math.cos(deg2rad(lat2)) * 
        Math.sin(dLon/2) * Math.sin(dLon/2);
        var c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a)); 
        var d = R * c; // Distance in km
        return d;
    }

    function deg2rad(deg) {
      return deg * (Math.PI/180)
    }
  }

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