Mapping with canvas

forked from pnavarrc's block: Mapping with canvas

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1">

<title>Zoom and Rotating (Reprojecting)</title>

// Set the dimensions of the map
    var width  = 1060,
        height = 480,
        speed = 1e-2;

// Create a selection for the container div and append the svg element
    var div = d3.select('#map-container'),
        canvas = div.select('canvas#container'),
        context = canvas.node().getContext("2d");

canvas
      .attr('width', width)
      .attr('height', height);

// Create and configure a geographic projection
    var projection = d3.geo.orthographic()
      .scale(height / 0.5)
      .clipAngle(100)
      .translate([width / 2, height / 2])
      .precision(0.1);

// Create and configure a path generator
    var pathGenerator = d3.geo.path()
      .projection(projection)
      .context(context);

// Create and configure the graticule generator (one line every 30 degrees)
    var graticule = d3.geo.graticule();

// Retrieve the geographic data asynchronously
    d3.json('land.geojson', function(err, data) {

// Throw errors on getting or parsing the file
      if (err) { throw err; }

// Background
      context.fillStyle = '#ddd';
      context.fillRect(0, 0, width, height);

// Rotate the globe
      d3.timer(function(elapsed) {

projection.rotate([speed * elapsed, -30, -40]);

// Canvas Drawing
        context.clearRect(0, 0, width, height);

// Sphere
        context.beginPath();
        pathGenerator({type: 'Sphere'});
        context.strokeStyle = "#666";
        context.stroke();
        context.fillStyle = '#eee';
        context.fill();

// Graticule
        context.beginPath();
        pathGenerator(graticule());
        context.strokeStyle = "#666";
        context.stroke();

// Countries
        context.beginPath();
        pathGenerator(data);
        context.fillStyle = "#999";
        context.fill();
      });

});
  </script>

</body>
</html>

https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.6/d3.min.js