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@tmcw
Created March 12, 2013 22:15
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Basic d3 Example
<!DOCTYPE html>
<meta charset="utf-8">
<style>
body {
margin: 0;
font:normal 10px/15px 'Helvetica', sans-serif;
}
a {
color:#444;
}
.map {
position: absolute;
top:0;
bottom:0;
right:0;
left:0;
overflow: hidden;
}
.layer {
position: absolute;
}
.tile {
position: absolute;
width: 256px;
height: 256px;
}
.info {
position: absolute;
bottom: 10px;
left: 10px;
}
.attribution {
position:absolute;
bottom:0;
left:0;
z-index:9;
background:#fff;
padding:2px 4px;
}
</style>
<body>
<div class='attribution'><a href='http://mapbox.com/about/maps/'>Terms &amp; Conditions</a></div>
<script src="http://d3js.org/d3.v3.min.js"></script>
<script src="http://d3js.org/d3.geo.tile.v0.min.js"></script>
<script>
var width = window.innerWidth,
height = window.innerHeight,
prefix = prefixMatch(["webkit", "ms", "Moz", "O"]);
var tile = d3.geo.tile()
.size([width, height]);
var projection = d3.geo.mercator();
var zoom = d3.behavior.zoom()
.scale(1 << 10)
.scaleExtent([1 << 9, 1 << 23])
.translate([width / 2, height / 2])
.on("zoom", zoomed);
var map = d3.select("body").append("div")
.attr("class", "map")
.style("width", width + "px")
.style("height", height + "px")
.call(zoom);
var layer = map.append("div")
.attr("class", "layer");
var info = map.append("div")
.attr("class", "info");
zoomed();
function zoomed() {
var tiles = tile
.scale(zoom.scale())
.translate(zoom.translate())
();
projection
.scale(zoom.scale())
.translate(zoom.translate());
var image = layer
.style(prefix + "transform", matrix3d(tiles.scale, tiles.translate))
.selectAll(".tile")
.data(tiles, function(d) { return d; });
image.exit()
.remove();
image.enter().append("img")
.attr("class", "tile")
.attr("src", function(d) { return "http://" + ["a", "b", "c", "d"][Math.random() * 4 | 0] +
".tiles.mapbox.com/v3/examples.map-vyofok3q/" + d[2] + "/" + d[0] + "/" + d[1] + ".png"; })
.style("left", function(d) { return (d[0] << 8) + "px"; })
.style("top", function(d) { return (d[1] << 8) + "px"; });
}
function matrix3d(scale, translate) {
var k = scale / 256, r = scale % 1 ? Number : Math.round;
return "matrix3d(" + [k, 0, 0, 0, 0, k, 0, 0, 0, 0, k, 0, r(translate[0] * scale), r(translate[1] * scale), 0, 1 ] + ")";
}
function prefixMatch(p) {
var i = -1, n = p.length, s = document.body.style;
while (++i < n) if (p[i] + "Transform" in s) return "-" + p[i].toLowerCase() + "-";
return "";
}
</script>
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