Sphere Mollweide

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<!DOCTYPE html>
<html>
  <head>
    <title>Sphere Mollweide</title>
    <link rel="stylesheet" href="https://openlayers.org/en/v4.6.4/css/ol.css" type="text/css">
    <!-- The line below is only needed for old environments like Internet Explorer and Android 4.x -->
    <script src=""></script>
    <script src="https://openlayers.org/en/v4.6.4/build/ol.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/proj4js/2.4.4/proj4.js"></script>
  </head>
  <body>
    <div id="map" class="map"></div>
    <script>
      proj4.defs('ESRI:53009', '+proj=moll +lon_0=0 +x_0=0 +y_0=0 +a=6371000 ' +
          '+b=6371000 +units=m +no_defs');

      // Configure the Sphere Mollweide projection object with an extent,
      // and a world extent. These are required for the Graticule.
      var sphereMollweideProjection = new ol.proj.Projection({
        code: 'ESRI:53009',
        extent: [-9009954.605703328, -9009954.605703328,
          9009954.605703328, 9009954.605703328],
        worldExtent: [-179, -89.99, 179, 89.99]
      });

      var map = new ol.Map({
        keyboardEventTarget: document,
        layers: [
          new ol.layer.Vector({
            source: new ol.source.Vector({
              url: 'https://openlayers.org/en/v4.6.4/examples/data/geojson/countries-110m.geojson',
              format: new ol.format.GeoJSON()
            })
          })
        ],
        target: 'map',
        view: new ol.View({
          center: [0, 0],
          projection: sphereMollweideProjection,
          resolutions: [65536, 32768, 16384, 8192, 4096, 2048],
          zoom: 0
        })
      });

      new ol.Graticule({
        map: map
      });
    </script>
  </body>
</html>