Globe pan

forked from emeeks's block: Ch. 7 Fig. 12 - D3.js in Action

<html>
<head>
  <title>D3 in Action Chapter 7 - Example 5</title>
  <meta charset="utf-8" />
<script src="https://d3js.org/d3.v3.min.js" type="text/JavaScript"></script>
<script src="https://d3js.org/d3.geo.projection.v0.min.js" type="text/JavaScript"></script>
<script src="https://d3js.org/queue.v1.min.js" type="text/JavaScript"></script>
<script src="https://d3js.org/colorbrewer.v1.min.js" type="text/JavaScript"></script>
</head>
<style>
  svg {
    border: 1px solid gray;
  }
  
  .countries {
    fill: red;
    fill-opacity: .5;
    stroke: black;
    stroke-width: 1px;
  }

</style>
<body>

<div id="viz">
</div>
<div id="controls" />
</body>
  <footer>
    
<script>
  
  var width = 800;
  var height = 500;
  d3.select("#viz").append("svg").attr("width", width).attr("height", height);
  
     queue()
    .defer(d3.json, "world.geojson")
    .defer(d3.csv, "cities.csv")
    .await(function(error, file1, file2) { createMap(file1, file2); });
    
  function createMap(countries, cities) {
    expData = countries;
    projection = d3.geo.orthographic()
    .scale((Math.min(width,height) / 2))
    .translate([width / 2, height / 2])
    .clipAngle(90);
    geoPath = d3.geo.path().projection(projection);
    
    var mapZoom = d3.behavior.zoom().translate(projection.translate()).scale(projection.scale()).on("zoom", zoomed);
    
    d3.select("svg").call(mapZoom);
    
    var rotateScale = d3.scale.linear()
    .domain([0, width])
    .range([0, 180]);
    var currentRotation = projection.rotate();
    
    d3.select("svg").on("mousedown", startRotating).on("mouseup", stopRotating);
    
    function startRotating() {
      var pStart = d3.mouse(this);
      var currentLat = (currentRotation[1] + 360) % 360;
      var xFactor = (currentLat > 90 && currentLat < 270) ? -1.0 : 1.0;
      d3.select("svg").on("mousemove", function() {
        var p = d3.mouse(this);
        projection.rotate([
          currentRotation[0] + xFactor * (rotateScale(p[0] - pStart[0])),
          currentRotation[1] + rotateScale(pStart[1] - p[1])]);
        zoomed();
      });
    }

mapZoom.scale(newZoom).translate([newX,newY])
      zoomed();
    }
}

</script>
  </footer>

</html>

Modified http://d3js.org/d3.v3.min.js to a secure url

Modified http://d3js.org/d3.geo.projection.v0.min.js to a secure url

Modified http://d3js.org/queue.v1.min.js to a secure url

Modified http://d3js.org/colorbrewer.v1.min.js to a secure url

https://d3js.org/d3.v3.min.js

https://d3js.org/d3.geo.projection.v0.min.js

https://d3js.org/queue.v1.min.js

https://d3js.org/colorbrewer.v1.min.js