Is it possible to calculate distance between two markers in angular-google-maps?

Question

I want to show the distance between a central marker to each another markers in its own window. Is there any way to calculate distance in angular-google-maps?

Below is the code from here.

map.html

<div id="map_canvas" ng-controller="mainCtrl">
    <ui-gmap-google-map center="map.center" zoom="map.zoom" draggable="true" options="options" bounds="map.bounds">
        <ui-gmap-markers models="randomMarkers" coords="'self'" icon="'icon'">
        </ui-gmap-markers>
    </ui-gmap-google-map>
</div>

controller.js

angular.module('appMaps', ['uiGmapgoogle-maps'])
  .controller('mainCtrl', function($scope) {
    $scope.map = {
      center: {
        latitude: 40.1451,
        longitude: -99.6680
      },
      zoom: 4,
      bounds: {}
    };
    $scope.options = {
      scrollwheel: false
    };
    var createRandomMarker = function(i, bounds, idKey) {
      var lat_min = bounds.southwest.latitude,
        lat_range = bounds.northeast.latitude - lat_min,
        lng_min = bounds.southwest.longitude,
        lng_range = bounds.northeast.longitude - lng_min;

      if (idKey == null) {
        idKey = "id";
      }

      var latitude = lat_min + (Math.random() * lat_range);
      var longitude = lng_min + (Math.random() * lng_range);
      var ret = {
        latitude: latitude,
        longitude: longitude,
        title: 'm' + i
      };
      ret[idKey] = i;
      return ret;
    };
    $scope.randomMarkers = [];
    // Get the bounds from the map once it's loaded
    $scope.$watch(function() {
      return $scope.map.bounds;
    }, function(nv, ov) {
      // Only need to regenerate once
      if (!ov.southwest && nv.southwest) {
        var markers = [];
        for (var i = 0; i < 2; i++) {
          markers.push(createRandomMarker(i, $scope.map.bounds))
        }
        $scope.randomMarkers = markers;
      }
    }, true);
  });

You probably need to use the [Haversine formula](https://en.wikipedia.org/wiki/Haversine_formula). Here's a [good example](http://stackoverflow.com/a/27943/3928341) — nem035, Nov 27 '15 at 01:24

score 5 · Answer 1 · answered Nov 27 '15 at 06:19

Why adding additional code when the function is already in google maps? Just include geometry library and:

google.maps.geometry.spherical.computeDistanceBetween(latLng, latLng)

Docs: https://developers.google.com/maps/documentation/javascript/geometry?hl=en

score 1 · Accepted Answer · answered Nov 27 '15 at 01:26

1

Haversine formula:

a = sin²(Δφ/2) + cos φ1 ⋅ cos φ2 ⋅ sin²(Δλ/2)
c = 2 ⋅ atan2( √a, √(1−a) )
d = R ⋅ c

javascript code:

var R = 6371000; // metres
var φ1 = lat1.toRadians();
var φ2 = lat2.toRadians();
var Δφ = (lat2-lat1).toRadians();
var Δλ = (lon2-lon1).toRadians();

var a = Math.sin(Δφ/2) * Math.sin(Δφ/2) +
        Math.cos(φ1) * Math.cos(φ2) *
        Math.sin(Δλ/2) * Math.sin(Δλ/2);
var c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a));

var d = R * c;

Source from link

I've used this function all my distance measurement and it works well.

answered Nov 27 '15 at 01:26

RockOnGom

3,893
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btw, `.toRadians()` is undefined. I use `function deg2rad(deg) { return deg * (Math.PI/180) }` instead to convert to radians. – Disp Hay Nov 27 '15 at 03:01
Yeas, you should define toradious function as seems in the link I share. – RockOnGom Nov 27 '15 at 04:55

score -1 · Answer 3 · edited May 17 '18 at 01:54

-1

Use my highly optimized open-source package to do the calculations for you. Just one simple line and it will do the rest. We got your back.

Use guide: https://www.npmjs.com/package/haversine-calculator

haversineCalculator(start, end,{unit: 'meter'})

edited May 17 '18 at 01:54

Undo

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answered May 17 '18 at 01:25

Jilvan Pinheiro

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Is it possible to calculate distance between two markers in angular-google-maps?

3 Answers3