yo

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle'
});

router.js

import Ember from 'ember';
import config from './config/environment';

const Router = Ember.Router.extend({
  location: 'none',
  rootURL: config.rootURL
});

Router.map(function() {
  this.route('my-route', {path: '/'});
});

export default Router;

routes.my-route.js

import Ember from 'ember';

export default Ember.Route.extend({
  getLatLng() {
    return new Promise((resolve, reject) => {
      navigator.geolocation.getCurrentPosition((position) => {
        console.log(position);
        let lat = position.coords.latitude,
            lng = position.coords.longitude;

        resolve({lat, lng});
      }, () => {
        reject('could not get location');
      });
    });
  },

  model() {
    this.getLatLng().then((coords) => {
      console.log(coords);
    }).catch((reason) => {
      console.log(reason);
    });
  }
  
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{outlet}}
<br>
<br>

twiddle.json

{
  "version": "0.10.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.6.0",
    "ember-data": "2.6.1",
    "ember-template-compiler": "2.6.0"
  },
  "addons": {}
}