marcneuwirth/index.html

## index.html
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html lang="en">
<head>
  <!--
    Zoom/pan map example: integrates d3.geo with d3.behavior with the aim of
    producing a map that can be panned and zoomed.
    Iain Dillingham, http://dillingham.me.uk/
  -->
  <title>Zoom/pan map example</title>
  <script type="text/javascript" src="https://raw.github.com/mbostock/d3/master/d3.min.js"></script>
  <script type="text/javascript" src="https://raw.github.com/mbostock/d3/master/d3.geo.min.js"></script>
  <style type="text/css">
    #uk {
      fill: #E5F5F9;
      stroke: #2CA25F;
      stroke-width: 0.5;
    }
    #axes {
      stroke: #BDBDBD;
      stroke-width: 0.5;
    }
  </style>
</head>
<body>
  <div id="vis"></div>
  <script type="text/javascript">
    var w = 960;
    var h = 500;
    var proj = d3.geo.mercator();
    var path = d3.geo.path().projection(proj);
    var t = proj.translate(); // the projection's default translation
    var s = proj.scale() // the projection's default scale

    var map = d3.select("#vis").append("svg:svg")
        .attr("width", w)
        .attr("height", h)
        .call(d3.behavior.zoom().on("zoom", redraw));

    var axes = map.append("svg:g").attr("id", "axes");

    var xAxis = axes.append("svg:line")
        .attr("x1", t[0])
        .attr("y1", 0)
        .attr("x2", t[0])
        .attr("y2", h);

    var yAxis = axes.append("svg:line")
        .attr("x1", 0)
        .attr("y1", t[1])
        .attr("x2", w)
        .attr("y2", t[1]);

    var uk = map.append("svg:g").attr("id", "uk");

    d3.json("uk.json", function (json) {
      uk.selectAll("path")
          .data(json.features)
        .enter().append("svg:path")
          .attr("d", path);
    });

    function redraw() {
      // d3.event.translate (an array) stores the current translation from the parent SVG element
      // t (an array) stores the projection's default translation
      // we add the x and y vales in each array to determine the projection's new translation
      var tx = t[0] * d3.event.scale + d3.event.translate[0];
      var ty = t[1] * d3.event.scale + d3.event.translate[1];
      proj.translate([tx, ty]);

      // now we determine the projection's new scale
      proj.scale(s * d3.event.scale);

      // redraw the map
      uk.selectAll("path").attr("d", path);

      // redraw the x axis
      xAxis.attr("x1", tx).attr("x2", tx);

      // redraw the y axis
      yAxis.attr("y1", ty).attr("y2", ty);
    }
  </script>
</body>
</html>

## uk.json

      
Display the source blob

    
Display the rendered blob

    
    Raw
  

              uk.json
            
          
      Sorry, something went wrong. Reload?
      Sorry, we cannot display this file.
      Sorry, this file is invalid so it cannot be displayed.
      
          Viewer requires iframe.
	<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
	<html lang="en">
	<head>
	<!--
	Zoom/pan map example: integrates d3.geo with d3.behavior with the aim of
	producing a map that can be panned and zoomed.
	Iain Dillingham, http://dillingham.me.uk/
	-->
	<title>Zoom/pan map example</title>
	<script type="text/javascript" src="https://raw.github.com/mbostock/d3/master/d3.min.js"></script>
	<script type="text/javascript" src="https://raw.github.com/mbostock/d3/master/d3.geo.min.js"></script>
	<style type="text/css">
	#uk {
	fill: #E5F5F9;
	stroke: #2CA25F;
	stroke-width: 0.5;
	}
	#axes {
	stroke: #BDBDBD;
	stroke-width: 0.5;
	}
	</style>
	</head>
	<body>
	<div id="vis"></div>
	<script type="text/javascript">
	var w = 960;
	var h = 500;
	var proj = d3.geo.mercator();
	var path = d3.geo.path().projection(proj);
	var t = proj.translate(); // the projection's default translation
	var s = proj.scale() // the projection's default scale

	var map = d3.select("#vis").append("svg:svg")
	.attr("width", w)
	.attr("height", h)
	.call(d3.behavior.zoom().on("zoom", redraw));

	var axes = map.append("svg:g").attr("id", "axes");

	var xAxis = axes.append("svg:line")
	.attr("x1", t[0])
	.attr("y1", 0)
	.attr("x2", t[0])
	.attr("y2", h);

	var yAxis = axes.append("svg:line")
	.attr("x1", 0)
	.attr("y1", t[1])
	.attr("x2", w)
	.attr("y2", t[1]);

	var uk = map.append("svg:g").attr("id", "uk");

	d3.json("uk.json", function (json) {
	uk.selectAll("path")
	.data(json.features)
	.enter().append("svg:path")
	.attr("d", path);
	});

	function redraw() {
	// d3.event.translate (an array) stores the current translation from the parent SVG element
	// t (an array) stores the projection's default translation
	// we add the x and y vales in each array to determine the projection's new translation
	var tx = t[0] * d3.event.scale + d3.event.translate[0];
	var ty = t[1] * d3.event.scale + d3.event.translate[1];
	proj.translate([tx, ty]);

	// now we determine the projection's new scale
	proj.scale(s * d3.event.scale);

	// redraw the map
	uk.selectAll("path").attr("d", path);

	// redraw the x axis
	xAxis.attr("x1", tx).attr("x2", tx);

	// redraw the y axis
	yAxis.attr("y1", ty).attr("y2", ty);
	}
	</script>
	</body>
	</html>