How to find specific point coordinates

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How to find specific point coordinates

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#1 by (2 votes)
#2 by (0 votes)

1

I need the coordinates of a specific Google Maps point. Like as if I clicked on a point and somehow the API showed me the mnsm string. Well I need to calculate distance between 2 points

javascript google-maps coordenadas

asked by anonymous 19.05.2015 / 04:12

2 answers

0

Code for distance calculation between 2 points:

public double distanciaEmMetros(double lat1, double long1, double lat2, double long2) {
    final Location start = new Location("Start Point");
    start.setLatitude(lat1);
    start.setLongitude(long1); //

    final Location finish = new Location("Finish Point");
    finish.setLatitude(lat2);
    finish.setLongitude(long2);

    final float distance = start.distanceTo(finish);

    return distance;
}

19.05.2015 / 05:24

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score 2 · Accepted Answer

Here are examples in HTML page and Android application.

HTML Page

The following example opens a popup when you click on the map:

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title></title>
</head>
<body>
    <script type="text/javascript" src="http://maps.googleapis.com/maps/api/js?sensor=false"></script><scripttype="text/javascript">
        window.onload = function () {
            var mapOptions = {
                center: new google.maps.LatLng(18.9300, 72.8200),
                zoom: 14,
                mapTypeId: google.maps.MapTypeId.ROADMAP
            };
            var infoWindow = new google.maps.InfoWindow();
            var latlngbounds = new google.maps.LatLngBounds();
            var map = new google.maps.Map(document.getElementById("dvMap"), mapOptions);
            google.maps.event.addListener(map, 'click', function (e) {
                alert("Latitude: " + e.latLng.lat() + "\r\nLongitude: " + e.latLng.lng());
            });
        }
    </script>
    <div id="dvMap" style="width: 500px; height: 500px">
    </div>
</body>
</html>

See JsFiddle working.

Android

See the example to follow for android:

Class EventDemoActivity :

public class EventsDemoActivity extends FragmentActivity
   implements OnMapClickListener, OnMapLongClickListener {

      private GoogleMap mMap;
      private TextView mTapTextView;

      @Override
      protected void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.events_demo);

          mTapTextView = (TextView) findViewById(R.id.tap_text);

          setUpMapIfNeeded();
      }

      private void setUpMap() //If the setUpMapIfNeeded(); is needed then...
      {
          mMap.setOnMapClickListener(this);
          mMap.setOnMapLongClickListener(this);
      }

      @Override
      public void onMapClick(LatLng point) {
          mTapTextView.setText("tapped, point=" + point);
      }

      @Override
      public void onMapLongClick(LatLng point) {
          mTapTextView.setText("long pressed, point=" + point);
      }
}

Layout events_demo.xml :

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:orientation="vertical">
  <TextView
    android:id="@+id/tap_text"
    android:text="@string/tap_instructions"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"/>
  <fragment
    android:id="@+id/map"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    class="com.google.android.gms.maps.SupportMapFragment"/>
</LinearLayout>

You can download the full sample here .