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index.html
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<!DOCTYPE html>
<meta charset="utf-8">
<head>
<style>
body {
margin: 0;
}
.map {
position: relative;
overflow: hidden;
}
.layer {
position: absolute;
}
.tile {
position: absolute;
width: 256px;
height: 256px;
}
</style>
<script src="d3.v3.min.js"></script>
<script src="tile.js"></script>
<!--
<script src="http://d3js.org/d3.v3.min.js"></script>
<script src="https://raw.github.com/d3/d3-plugins/master/geo/tile/tile.js"></script>
-->
<script src="osmstyle.js"></script>
<script src="wkmap.js"></script>
</head>
<body>
<script>
var TMS_URL = '/_canvasback/tms'
var home = [-122.3959350585, 37.7935076241]
//var home = [-122.410312, 37.761012]
//var TILE_URL = "http://tile.stamen.com/toner-labels/"
var TILE_URL = "http://tile.stamen.com/toner/"
var proj = d3.geo.mercator()
.center(home)
.scale(Math.pow(2,24));
var width = window.innerWidth,
height = window.innerHeight,
prefix = prefixMatch(["webkit", "ms", "Moz", "O"]);
var tile = d3.geo.tile()
.size([width, height]);
var zoom = d3.behavior.zoom()
.scale(proj.scale())
//.scaleExtent([2 << 8, Math.pow(2,32)])
.translate(proj([0,0]))
.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");
zoomed();
function load(tile, canvas) {
var uri = TMS_URL + '/' + tile[2] + '/' + tile[0] + '/' + tile[1] + '.ukb'
, buf = new XMLHttpRequest;
buf.open("GET", uri, true);
buf.responseType = 'arraybuffer'
buf.onreadystatechange = function () {
if (buf.readyState === 4) {
if (buf.status === 200) {
if (buf.response === null) {
return;
} else {
uncollect(buf.response, canvas);
//console.log(buf.response.byteLength);
//d3.select(canvas).attr("class", "tile")
}
}
}
}
buf.onerror = function (err) { console.log(err); };
buf.send(null)
return buf
}
function zoomed() {
var tiles = tile
.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("canvas")
.attr("class", "tile")
.attr("height", "256px")
.attr("width", "256px")
.attr("id", function(d) {
load(d, this);
return d;
})
.style("left", function(d) { return (d[0] * 256) + "px"; })
.style("top", function(d) { return (d[1] * 256) + "px"; });
//.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>