rijkswaterstaatstrooit/index.html at gh-pages · maptime-ams/rijkswaterstaatstrooit · GitHub

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<!doctype html>
<html lang="en">
  <head>
    <title>Rijkswaterstaat Strooit</title>
    <meta charset="utf-8">
    <meta name="viewport"content="width=device-width,initial-scale=1">
    <link rel="stylesheet" href="http://cdn.leafletjs.com/leaflet-0.7.3/leaflet.css" />
    <script src="http://cdn.leafletjs.com/leaflet-0.7.3/leaflet.js"></script>
    <script src="http://d3js.org/d3.v3.min.js" charset="utf-8"></script>
    <style>
      * {
        margin: 0;
        padding: 0;
      }

      #map {
        position: absolute;
        width: 100%;
        height: 100%;
      }

      #info {
        font-size: 18px;
        color: black;
        position: absolute;
        bottom: 20px;
        left: 20px;
        background-color: white;
        border-radius: 4px;
        box-shadow: 0 1px 5px rgba(0, 0, 0, 0.65);
        padding: 8px;
        width: 850px;
      }

      #info h4 {
        display: inline;
        font-size: 25px;
      }

      #info p {
        padding-top: 3px;
      }

      #maptime {
        float: right;
        padding-left: 20px;
      }

      a, a:visited {
        color: black;
      }
      </style>
  </head>
  <body>
  	</header>
    <div id="map"></div>
    <div id="info">
      <p>
        <h4>
          <a href="http://www.rijkswaterstaatstrooit.nl/">Rijkswaterstaat Strooit</a>, but using <a href="http://leafletjs.com/">Leaflet</a> and <a href="https://www.mapbox.com/blog/winter-wonderland/">OpenStreetMap</a>.
        </h4>
        <a id="maptime" href="http://maptime-ams.github.io/"><img src="maptime.png" /></a>
      </p>
      <p>
        This map shows the real-time positions of Rijkswaterstaat's winter service vehicles, and refreshes every 20 seconds. <img src="tractor.png" height="17px" /> are trucks on duty; <img src="tractor-gray.png" height="17px" /> are waiting for snow in their depot. Come to <a href="http://maptime-ams.github.io/">Maptime Amsterdam</a>'s next Meetup to learn how to make interactive maps yourself!
      </p>
    </div>
    <script>
      // Rijkswaterstaat Strooit, with Google Maps...
      // http://www.rijkswaterstaatstrooit.nl/
      // Let's use Leaflet and OpenStreetMap!

      // Stolen from https://www.mapbox.com/blog/winter-wonderland/ ...
      var mapId = "andreasviglakis.76e0cee7",
          accessToken = 'pk.eyJ1IjoiYW5kcmVhc3ZpZ2xha2lzIiwiYSI6IlVremRqN0kifQ.CFFJsLuWWyuhgsZTb51jWg',
          tileUrl = "https://{s}.tiles.mapbox.com/v4/" + mapId + "/{z}/{x}/{y}.png?access_token=" + accessToken,
          map = L.map('map', {maxZoom: 17}),
          tractor = L.icon({
            iconUrl: 'tractor.png',
            iconSize:     [32, 32],
            iconAnchor:   [16, 16],
            popupAnchor:  [32, 0]
          }),
          tractorGray = L.icon({
            iconUrl: 'tractor-gray.png',
            iconSize:     [32, 32],
            iconAnchor:   [16, 16],
            popupAnchor:  [32, 0]
          });


      // URL with JSON containing real-time position of Rijkswaterstaat's winter service vehicles:
      var rwsUrl = "http://www.rijkswaterstaatstrooit.nl/include/query.php";

      // Rijkswaterstaat does not have CORS enabled...
      // Luckily, there is https://jsonp.nodejitsu.com/
      var url = "https://jsonp.nodejitsu.com/?url=" + rwsUrl;

      L.tileLayer(tileUrl).addTo(map);

      var geojsonLayer = L.geoJson(null, {
        pointToLayer: function (feature, latlng) {
          if (feature.properties.status == 34) {
            return L.marker(latlng, {icon: tractorGray});
          } else {
            return L.marker(latlng, {icon: tractor});
          }
        }
      }).addTo(map);

      map.setView([52.3728, 4.9002], 10);

      function update () {
        d3.json(url, function(json) {
          // json is object containing vehicle positions:
          // "218320013": [
          //   [
          //     "52.72648700",
          //     "5.75918000",
          //     "34",
          //     "2015-02-24 14:51:31"
          //   ]
          // ]

          var features = [];
          Object.keys(json).forEach(function(key) {
            var item = json[key][0];
            features.push({
              type: "Feature",
              properties: {
                status: parseInt(item[2]),
                timestamp: item[3]
              },
              geometry: {
                type: "Point",
                coordinates: [parseFloat(item[1]), parseFloat(item[0])]
              }
            });

          });

          geojsonLayer.clearLayers();
          geojsonLayer.addData({
            type: "FeatureCollection",
            features: features
          });
        });
      }

      setInterval(update, 20000);
      update();
    </script>
  </body>
</html>