mbostock/.block

## .block
license: gpl-3.0

## README.md

      
    Raw
  

              README.md
            
          
    Adapting the earlier OSM vector tiles example to show how to render multiple layers.

  
## d3.geo.tile.min.js
d3.geo.tile=function(){function t(){var t=Math.max(Math.log(n)/Math.LN2-8,0),h=Math.round(t+e),o=Math.pow(2,t-h+8),u=[(r[0]-n/2)/o,(r[1]-n/2)/o],l=[],c=d3.range(Math.max(0,Math.floor(-u[0])),Math.max(0,Math.ceil(a[0]/o-u[0]))),M=d3.range(Math.max(0,Math.floor(-u[1])),Math.max(0,Math.ceil(a[1]/o-u[1])));return M.forEach(function(t){c.forEach(function(a){l.push([a,t,h])})}),l.translate=u,l.scale=o,l}var a=[960,500],n=256,r=[a[0]/2,a[1]/2],e=0;return t.size=function(n){return arguments.length?(a=n,t):a},t.scale=function(a){return arguments.length?(n=a,t):n},t.translate=function(a){return arguments.length?(r=a,t):r},t.zoomDelta=function(a){return arguments.length?(e=+a,t):e},t};

## index.html
<!DOCTYPE html>
<meta charset="utf-8">
<style>

body {
  margin: 0;
}

path {
  fill: none;
  stroke: #000;
  stroke-linejoin: round;
  stroke-linecap: round;
}

.major_road { stroke: #776; }
.minor_road { stroke: #ccb; }
.highway { stroke: #f39; stroke-width: 1.5px; }
.rail { stroke: #7de; }
.buildings path { stroke: none; fill: black; }

</style>
<body>
<script src="//d3js.org/d3.v3.min.js"></script>
<script src="d3.geo.tile.min.js"></script>
<script>

var width = Math.max(960, window.innerWidth),
    height = Math.max(500, window.innerHeight);

var tiler = d3.geo.tile()
    .size([width, height]);

var projection = d3.geo.mercator()
    .center([-122.41, 37.79])
    .scale((1 << 23) / 2 / Math.PI)
    .translate([width / 2, height / 2]);

var path = d3.geo.path()
    .projection(projection);

var svg = d3.select("body").append("svg")
    .attr("width", width)
    .attr("height", height)
    .call(renderTiles, "highroad")
    .call(renderTiles, "buildings");

function renderTiles(svg, type) {
  svg.append("g")
      .attr("class", type)
    .selectAll("g")
      .data(tiler
        .scale(projection.scale() * 2 * Math.PI)
        .translate(projection([0, 0])))
    .enter().append("g")
      .each(function(d) {
        var g = d3.select(this);
        d3.json("http://" + ["a", "b", "c"][(d[0] * 31 + d[1]) % 3] + ".tile.openstreetmap.us/vectiles-" + type + "/" + d[2] + "/" + d[0] + "/" + d[1] + ".json", function(error, json) {
          g.selectAll("path")
              .data(json.features.sort(function(a, b) { return a.properties.sort_key - b.properties.sort_key; }))
            .enter().append("path")
              .attr("class", function(d) { return d.properties.kind; })
              .attr("d", path);
        });
      });
}

</script>

## thumbnail.png

      
    Raw
  

              thumbnail.png
	<!DOCTYPE html>
	<meta charset="utf-8">
	<style>

	body {
	margin: 0;
	}

	path {
	fill: none;
	stroke: #000;
	stroke-linejoin: round;
	stroke-linecap: round;
	}

	.major_road { stroke: #776; }
	.minor_road { stroke: #ccb; }
	.highway { stroke: #f39; stroke-width: 1.5px; }
	.rail { stroke: #7de; }
	.buildings path { stroke: none; fill: black; }

	</style>
	<body>
	<script src="//d3js.org/d3.v3.min.js"></script>
	<script src="d3.geo.tile.min.js"></script>
	<script>

	var width = Math.max(960, window.innerWidth),
	height = Math.max(500, window.innerHeight);

	var tiler = d3.geo.tile()
	.size([width, height]);

	var projection = d3.geo.mercator()
	.center([-122.41, 37.79])
	.scale((1 << 23) / 2 / Math.PI)
	.translate([width / 2, height / 2]);

	var path = d3.geo.path()
	.projection(projection);

	var svg = d3.select("body").append("svg")
	.attr("width", width)
	.attr("height", height)
	.call(renderTiles, "highroad")
	.call(renderTiles, "buildings");

	function renderTiles(svg, type) {
	svg.append("g")
	.attr("class", type)
	.selectAll("g")
	.data(tiler
	.scale(projection.scale() * 2 * Math.PI)
	.translate(projection([0, 0])))
	.enter().append("g")
	.each(function(d) {
	var g = d3.select(this);
	d3.json("http://" + ["a", "b", "c"][(d[0] * 31 + d[1]) % 3] + ".tile.openstreetmap.us/vectiles-" + type + "/" + d[2] + "/" + d[0] + "/" + d[1] + ".json", function(error, json) {
	g.selectAll("path")
	.data(json.features.sort(function(a, b) { return a.properties.sort_key - b.properties.sort_key; }))
	.enter().append("path")
	.attr("class", function(d) { return d.properties.kind; })
	.attr("d", path);
	});
	});
	}

	</script>