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HTML 

              
                <!-- https://sites.google.com/view/mapbox-decompress-2018/map-2?authuser=0 -->
<script src='https://api.mapbox.com/mapbox-gl-js/v0.44.1/mapbox-gl.js'></script>
<link href='https://api.mapbox.com/mapbox-gl-js/v0.44.1/mapbox-gl.css' rel='stylesheet' />

<body>
  <!--initiate map container...sdf. -->
  <div id='map'></div>
  <div class='map-overlay' id='title'><h2>New and Proposed Building Development within the City of Melbourne</h2>
    <p>Toggle on and off buildings by development status below. Hover over the new buildings for further information</p></div>
    <div class='map-overlay' id='source'><t>Source: 3D development data from City of Melbourne, Feb 2018, available under
      <a href="https://creativecommons.org/licenses/by/3.0/au/deed.en">creative commons licence</a> via
      <a href="https://data.melbourne.vic.gov.au/Property-Planning/3D-Development-Activity-Model-Footprints/def8-4wbt">
        Melbourne Data</a> </t></div>
        <nav id='button'></nav>

<script>
mapboxgl.accessToken = 'pk.eyJ1IjoidG9wYXp0ZWUiLCJhIjoiY2pmMzhsdWJnMGJndzJ3cDQxM2pnN3NnOCJ9.8Zz6EAAOwabhDKbI6BoJXA';

 
  // create the map
  var map = new mapboxgl.Map({
    container: 'map', // container id
    style: 'mapbox://styles/mapbox/light-v9',
    maxZoom: 17, // set maxZoom
    minZoom: 13, // set minZoom
    maxBounds: [[144.9,-37.85],[145.0,-37.8]],
    bearing: 15,  // direction
    pitch: 60, // angle
    zoom: 15, // default zoom level
    center: [144.965, -37.815] // default location
  });


  map.on('load', function() {

    var popup = new mapboxgl.Popup({
      closeButton: false,
      closeOnClick: false
    });
    //add map source for current buildings layer:
    map.addSource('buildingSource', {
      'type': 'vector',
      'url': 'mapbox://mapbox.mapbox-streets-v7'
    }
  );

    map.addLayer({
      'id': 'currentbuildings',
      'source': 'buildingSource',
      'source-layer': 'building',
      'type': 'fill-extrusion',
      'paint': {
        'fill-extrusion-color': '#999999',
        'fill-extrusion-height': {
          'type': 'identity',
          'property': 'height'
        },
        'fill-extrusion-opacity': 0.7
      }
    });


    // variable arrays for status names and their colours - in stored tileset
    var statusNames = ['APPLIED', 'APPROVED', 'UNDER CONSTRUCTION', 'COMPLETED'];
    // colorbrewer colours every 2nd from 6-class YlGnBu
    var statusColors = ['#08519c', '#6baed6', '#c6dbef', '#999999'];

    // add the source layer for new building development data:
    // map.addSource('myLayer', {
    //   'type': 'vector',
    //   'url': 'mapbox://sgeoviz.2m5ilbt9'
    // });


    // Colour layers by their status and add an interactive legend
    for (var i = 0; i < statusNames.length; i++) {
      var statusName = statusNames[i];
      var statusColor = statusColors[i];

      map.addLayer({
        'id': statusName,
        'source': {
          'type': 'vector',
          'url': 'mapbox://sgeoviz.2m5ilbt9'
        },
        'source-layer': 'DevelopmentFootprint_OpenData-ciw5bu',
        'type': 'fill-extrusion',
        'paint': {
          'fill-extrusion-height': {
            'type': 'identity',
            'property': 'bldhgt_ahd'
          },  'fill-extrusion-color': statusColor,
          'fill-extrusion-opacity': 0.7
        },
        'filter': ['==', 'status', statusName]

      });


// automatic popup open/close -- adapted from this example: https://www.mapbox.com/mapbox-gl-js/example/popup-on-hover/
// when mouse inside the layer we just created then do this:
map.on('mouseenter', statusName, function(e) {
  // Change the cursor style to pointer.
  map.getCanvas().style.cursor = 'pointer';
  // give the popup coordinates and populate the popup with text
  popup.setLngLat(e.lngLat)
  .setHTML(e.features[0].properties.status
    + ": " + e.features[0].properties.address
    + "<br> Expected Height: " + e.features[0].properties.bldhgt_ahd + "m / "
    + e.features[0].properties.num_floors + " storys <br> Proposed Use: "
    + e.features[0].properties.land_use_1 + ", "
    + e.features[0].properties.land_use_2 + ", "
    + e.features[0].properties.land_use_3
  )
  .addTo(map);
});
// when mouse out of building then remove popup automatically:
map.on('mouseleave', statusName, function() {
  map.getCanvas().style.cursor = '';
  popup.remove();
});
createButtons(statusName, statusColor);
};


});

map.addControl(new mapboxgl.NavigationControl());

// function where buttons are created and visibilty of layers on/off.
// adapted from Lab 5 code, adapted from https://www.mapbox.com/mapbox-gl-js/example/toggle-layers/
// This will later be adapted to also create buttons for filter by land use type / 3D/2D etc (version 3)
function createButtons(name, colour){

  var link = document.createElement('a');
  link.href = '#';
  link.className = 'active';
  link.textContent = name;
  link.style.backgroundColor = colour;

  link.onclick = function(e) {
    var clickedLayer = this.textContent; // hard coded for 3D layers
    e.preventDefault();
    e.stopPropagation();

    var visibility = map.getLayoutProperty(clickedLayer, 'visibility');
    // make layer visible / not visible when clicked.
    // hard coding to combine the currentbuildings with completed buildings ** to be improved in version 3 **
    if (clickedLayer == "COMPLETED" && visibility === 'visible')
    {
      map.setLayoutProperty(clickedLayer, 'visibility', 'none');
      map.setLayoutProperty('currentbuildings', 'visibility', 'none');
      this.className = '';
    }
    else if (visibility === 'visible') {
      map.setLayoutProperty(clickedLayer, 'visibility', 'none');
      this.className = '';
    }
    else if (clickedLayer == "COMPLETED")
    {
      map.setLayoutProperty(clickedLayer, 'visibility', 'visible');
      map.setLayoutProperty('currentbuildings', 'visibility', 'visible');
      this.className = 'active';
    }
    else {
      this.className = 'active';
      map.setLayoutProperty(clickedLayer, 'visibility', 'visible');
    }

  };

  var layers = document.getElementById('button');
  layers.appendChild(link);

}; // end createButtons function
  </script>
  </body>

The data contains the footprints and building information about recently developed buildings, those under development, approved for development and under consideration for planning permission
!

CSS 

              
                
body {
  margin: 0;
  padding: 0;
}

h2{
  margin-left: 10px;
  font-size: 1.2em;
}

p {
  font-size: 0.8em;
  margin-left : 10px;
  text-align: left;
}

t {
  font-size: 0.7em;
  text-align: left;
}

/**
* Create a position for the map
* on the page */
#map {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 100%;
}

/**
* Set rules for how the map overlays
* (info box and legend) will be displayed
* on the page. */
.map-overlay {
  position: absolute;
  background: rgba(255, 255, 255, 0.8);
  font-family: 'Helvetica Neue', Helvetica, Arial, Sans-serif;
  overflow: auto;
  border-radius: 3px;
  margin: 20px;
}

.mapboxgl-popup {
  max-width: 400px;
  font: 12px/20px 'Helvetica Neue', Arial, Helvetica, sans-serif;
}

#source {
  padding: 5px;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
  line-height: 10px;
  height: 8px;
  margin-bottom: 30px;
  width: 650px;
  bottom: 0;
}

#title {
  top: 0px;
  height: 85px;
  width: 670px;
}

#button {
  background: #fff;
  position: absolute;
  z-index: 1;
  top: 120px;
  left: 20px;
  border-radius: 3px;
  width: 120px;
  border: 1px solid rgba(0, 0, 0, 0.4);
  font-family: 'Arial', sans-serif;
  color: white;
  font-weight: normal;
}

#button a {
  font-size: 13px;
  color: #404040;
  display: block;
  margin: 0;
  padding: 0;
  padding: 10px;
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 0, 0, 0.25);
  text-align: center;
  border: none;
  font-weight: normal;
}


#button a:hover {
  color: #404040;
  font-weight: bold;
}

#button a.active {
    color: white;
    font-weight: normal;
}
#button a.active:hover {
  color: #404040;
  font-weight: bold;
}
!

JS
!
999px

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