D3 Examples - geojson

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<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script>
  <script src='https://api.mapbox.com/mapbox.js/v2.2.3/mapbox.js'></script>
  <link href='https://api.mapbox.com/mapbox.js/v2.2.3/mapbox.css' rel='stylesheet' />
  
  <style> 
    body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; }
    #map {
      position: absolute;
      width: 100%;
      height: 110%;
    }
  </style>
</head>
​
<body>
  <div id="map" class ="stuck"></div>
  <script>
    L.mapbox.accessToken = 'pk.eyJ1IjoiZW5qYWxvdCIsImEiOiJjaWhtdmxhNTIwb25zdHBsejk0NGdhODJhIn0.2-F2hS_oTZenAWc0BMf_uw'
    
    //Setup our Leaflet map using Mapbox.js
    var map = L.mapbox.map('map', 'mapbox.pencil' ,{zoomControl: false})
    .setView([38,-94],5);
    map.dragging.disable();
map.touchZoom.disable();
map.doubleClickZoom.disable();
map.scrollWheelZoom.disable();
    
    function project(latlng){
      var array = [+latlng.lat, +latlng.lon]
      var point = map.latLngToLayerPoint(L.latLng(latlng));
​
      return point;
    }
    
    // Setup our svg layer that we can manipulate with d3
    var svg = d3.select(map.getPanes().overlayPane)
      .append("svg");
    var g = svg.append("g").attr("class", "leaflet-zoom-hide");
    
    d3.json("geojson.json", function(err, geojson) {
      //console.log("data:", data)
 
      var dots = g.selectAll("circle.dot")
      
      console.log("geojson data:", geojson);
      L.geoJson(geojson).addTo(map);
      
​
      
      function update() {
        // We need to reposition our SVG and our containing group when the map
        // repositions via zoom or pan
        // https://github.com/zetter/voronoi-maps/blob/master/lib/voronoi_map.js
        var bounds = map.getBounds();
        var topLeft = map.latLngToLayerPoint(bounds.getNorthWest())
        var bottomRight = map.latLngToLayerPoint(bounds.getSouthEast())
        console.log(bounds, topLeft, bottomRight)
        svg.style("width", map.getSize().x + "px")
          .style("height", map.getSize().y + "px")
          .style("left", topLeft.x + "px")
          .style("top", topLeft.y + "px");
        g.attr("transform", "translate(" + -topLeft.x + "," + -topLeft.y + ")");
​
        dots.attr({
          cx: function(d) { return project(d).x },
          cy: function(d) { return project(d).y },
          r: 5
        })
      
      }
      update();
      
      map.on("viewreset", function() {
        update();
      })
      map.on("move", update)
    })
  </script>
</body>
​
    