开始使用简单的地图

Created: November-22, 2018
<html>
  <head>
    <title>Getting started</title>
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/ol3/3.17.1/ol.css" type="text/css">
    <script src="https://cdnjs.cloudflare.com/ajax/libs/ol3/3.17.1/ol.js"></script>
  </head>
  <body>
    <div id="map" class="map"></div>
    <script>
      var baseLayer= new ol.layer.Tile({ //a Tile layer is a the background layer for the map
        // here we choose an OpenStreetMap base layer
        source: new ol.source.OSM({
          url: 'https://a.tile.openstreetmap.org/{z}/{x}/{y}.png'
        }) 
      });

      var map = new ol.Map({ // we create our map
        layers: [baseLayer], // and add the layers to it ( in our case we only have one)
        target: 'map', // the div element that will serve as a map
        controls: ol.control.defaults({ // we leave the map controls to default
          attributionOptions: /** @type {olx.control.AttributionOptions} */ ({
            collapsible: false
          })
        }),
        view: new ol.View({ // we define the initial view of the map
          center: ol.proj.fromLonLat([0, 0]), //the default projection is the spherical mercator (meter units) so we get coordinates of the center by degrees
          zoom: 2 // the initial zoom level
        })
      });
    </script>
  </body>
</html>