Edit

Shared Views

Road

Aerial

Two maps share view properties

Two maps (one Road, one Aerial) share the same center, resolution and rotation.

Copy 
index.html<!DOCTYPE html>
<html lang="en">
  <head>
    <title>Shared Views</title>
    <!-- The line below is only needed for old environments like Internet Explorer and Android 4.x -->
    <script src="https://cdn.polyfill.io/v2/polyfill.min.js?features=requestAnimationFrame,Element.prototype.classList,URL"></script>
    <style>
      .map {
        width: 100%;
        height:400px;
      }
      @media (min-width: 800px) {
        .wrapper {
          display: flex;
        }
        .half {
          padding: 0 10px;
          width: 50%;
          float: left;
        }
      }
    </style>
  </head>
  <body>
    <div class="wrapper">
      <div class="half">
        <h4>Road</h4>
        <div id="roadMap" class="map"></div>
      </div>
      <div class="half">
        <h4>Aerial</h4>
        <div id="aerialMap" class="map"></div>
      </div>
    </div>
    <script src="index.js"></script>
  </body>
</html>
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index.jsimport 'ol/ol.css';
import Map from 'ol/Map';
import View from 'ol/View';
import TileLayer from 'ol/layer/Tile';
import BingMaps from 'ol/source/BingMaps';

var roadLayer = new TileLayer({
  source: new BingMaps({
    key: 'Your Bing Maps Key from http://www.bingmapsportal.com/ here',
    imagerySet: 'RoadOnDemand',
    maxZoom: 19
  })
});

var aerialLayer = new TileLayer({
  source: new BingMaps({
    key: 'Your Bing Maps Key from http://www.bingmapsportal.com/ here',
    imagerySet: 'Aerial',
    maxZoom: 19
  })
});

var view = new View({
  center: [-6655.5402445057125, 6709968.258934638],
  zoom: 13
});

var map1 = new Map({
  target: 'roadMap',
  layers: [roadLayer],
  view: view
});

var map2 = new Map({
  target: 'aerialMap',
  layers: [aerialLayer],
  view: view
});
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package.json{
  "name": "side-by-side",
  "dependencies": {
    "ol": "6.1.1"
  },
  "devDependencies": {
    "parcel": "1.11.0"
  },
  "scripts": {
    "start": "parcel index.html",
    "build": "parcel build --experimental-scope-hoisting --public-url . index.html"
  }
}