How to calculate REAL distance between two geopoints?

Question

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J2ME/Android/BlackBerry - driving directions, route between two locations

I want to calculate distance between two geopoints in android. I used Location.distanceTo and Location.distanceBetween but this method return DIRECT length between two points. I want to calculate the route between two points and then calculate the total distance between all route points.

I don't want to show points or route on map. I just want to calculate the distance from current location to given points nothings else.

ie. I want to calculate the Route length between two geo points. Can anyone help me to calculate the route length between two geo points?

The most "real" distance I can think of *is* the direct or great circle distance. A route is very conditional (car vs. pedestrian, avoid toll routes, avoid ferries, speed vs. distance travelled and so on) — Hauke Ingmar Schmidt, Feb 24 '12 at 10:23
I found my answer I used this Google api and this will return all the data about route. API : http://maps.googleapis.com/maps/api/distancematrix/json?origins=ORIGIN&destinations=DESTINATION&mode=bicycling&sensor=false thank you all for your support. — Vipul Purohit, Feb 24 '12 at 10:53

score 2 · Answer 1 · answered Feb 25 '12 at 04:55

2

I found my answer I used this Google api and this will return all the data about route.

API : Google Api for Route Calculation

You can find more info on Google Map Api

thank you all for your support.

answered Feb 25 '12 at 04:55

Vipul Purohit

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score 0 · Answer 2 · answered Feb 24 '12 at 10:27

This method returns distance:

public double distance(float latA,float longA,float latB,float longB){
        double d2r = Math.PI / 180;



            double dlong = (longA - longB) * d2r;
            double dlat = (latA - latB) * d2r;
            double a = Math.pow(Math.sin(dlat / 2.0), 2)
                    + Math.cos(latB * d2r) * Math.cos(latA * d2r)
                    * Math.pow(Math.sin(dlong / 2.0), 2);
            double c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
            double d = 6367 * c;

            return d;



}

But this is to find out displacement. And no idea about how to calculate distance between all route points. May be you can use this method and loop it.

This will return direct distance..I want the length of the route. — Vipul Purohit, Feb 24 '12 at 10:30

score 0 · Answer 3 · edited May 23 '17 at 12:14

I think what you are looking for is in this answer from a similar question

public class MapRouteActivity extends MapActivity {    
 LinearLayout linearLayout;
 MapView mapView;
 private Road mRoad;    
 @Override
 public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.main);
  mapView = (MapView) findViewById(R.id.mapview);
  mapView.setBuiltInZoomControls(true);    
  new Thread() {
   @Override
   public void run() {
    double fromLat = 49.85, fromLon = 24.016667; 
    double toLat = 50.45, toLon = 30.523333;
    String url = RoadProvider
      .getUrl(fromLat, fromLon, toLat, toLon);
    InputStream is = getConnection(url);
    mRoad = RoadProvider.getRoute(is);
    mHandler.sendEmptyMessage(0);
   }
  }.start();
 }

 Handler mHandler = new Handler() {
  public void handleMessage(android.os.Message msg) {
   TextView textView = (TextView) findViewById(R.id.description);
   textView.setText(mRoad.mName + " " + mRoad.mDescription);
   MapOverlay mapOverlay = new MapOverlay(mRoad, mapView);
   List<Overlay> listOfOverlays = mapView.getOverlays();
   listOfOverlays.clear();
   listOfOverlays.add(mapOverlay);
   mapView.invalidate();
  };
 };

 private InputStream getConnection(String url) {
  InputStream is = null;
  try {
   URLConnection conn = new URL(url).openConnection();
   is = conn.getInputStream();
  } catch (MalformedURLException e) {
   e.printStackTrace();
  } catch (IOException e) {
   e.printStackTrace();
  }
  return is;
 }    
 @Override
 protected boolean isRouteDisplayed() {
  return false;
 }
}

@Loshi you can have a look at this: https://developers.google.com/maps/ — SERPRO, Jul 18 '12 at 10:55

How to calculate REAL distance between two geopoints?

3 Answers3