D3 Examples - OSM users graph for wikipedia

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<!DOCTYPE html>
<html>
<head>
  <script src='https://api.tiles.mapbox.com/mapbox.js/v0.6.6/mapbox.js'></script>
  <link href='https://api.tiles.mapbox.com/mapbox.js/v0.6.6/mapbox.css' rel='stylesheet' />
  <style>
    body { margin:0; padding:0; }
    #map { position:absolute; top:0; bottom:0; width:100%; }
  </style>
</head>
<body>
<style>
.marker-image {
    width:100px;
    height:100px;
    border:1px solid #000;
    margin-left:-51px;
    margin-top:-51px;
    pointer-events:all;
    position:absolute;
}
</style>
<div id='map'></div>
<script>
    // Create map
    var map = mapbox.map('map');
    map.addLayer(mapbox.layer().id('examples.map-vyofok3q'));
​
    // Create and add marker layer
    var markerLayer = mapbox.markers.layer().features([{
        "geometry": { "type": "Point", "coordinates": [-74.00, 40]},
        "properties": { "image": "https://placehold.it/100x100" }
    }, {
        "geometry": { "type": "Point", "coordinates": [-75.00, 40]},
        "properties": { "image": "https://www.dummyimage.com/100x100/bd00bd/fff" }
    }]).factory(function(f) {
    // Define a new factory function. This takes a GeoJSON object
    // as its input and returns an element - in this case an image -
    // that represents the point.
        var img = document.createElement('img');
        img.className = 'marker-image';
        img.setAttribute('src', f.properties.image);
        return img;
    });
​
    map.addLayer(markerLayer)
        .setExtent(markerLayer.extent());
​
    // Attribute map
    map.ui.attribution.add()
        .content('<a href="https://mapbox.com/about/maps">Terms &amp; Feedback</a>');
</script>
</body>
</html><!DOCTYPE html>
<meta charset="utf-8">
<style>
​
body {
  font: 10px sans-serif;
}
​
.axis path,
.axis line {
  fill: none;
  stroke: #000;
  shape-rendering: crispEdges;
}
​
.area {
  fill: steelblue;
}
​
</style>
<body>
<script src="https://d3js.org/d3.v3.js"></script>
<a href="#" id="download">Download</a>
<script>
​
var data = [[1315612801000,461697],[1316476801000,461697],[1318204801000,476686],[1319068801000,481637],[1320883201000,492107],[1321747201000,496361],[1322611201000,501465],[1323475201000,506092],[1324339201000,510330],[1325289601000,515315],[1326153601000,520827],[1327017601000,527556],[1327968001000,533378],[1328832001000,538625],[1329696001000,543344],[1330473601000,547271],[1331337601000,557571],[1332201601000,567630],[1333152001000,576848],[1334016001000,587274],[1334880001000,595450],[1335744001000,602346],[1336608001000,609139],[1337472001000,615408],[1338422401000,622467],[1339286401000,629148],[1340150401000,637007],[1341014401000,643300],[1341878401000,651671],[1342742401000,671211],[1343692801000,691111],[1344556801000,710146],[1345420801000,730822],[1346371201000,755425],[1347235201000,775710],[1348099201000,799366],[1348963201000,825278],[1349827201000,848599],[1350691201000,868337],[1351641601000,886566],[1352505601000,904752]];
​
data = data.map(function(d) {
    return {
        date: new Date(d[0]),
        users: d[1]
    };
});
​
var margin = {top: 20, right: 20, bottom: 30, left: 50},
    width = 400 - margin.left - margin.right,
    height = 200 - margin.top - margin.bottom;
​
var x = d3.time.scale()
    .range([0, width]);
​
var y = d3.scale.linear()
    .range([height, 0]);
​
var xAxis = d3.svg.axis()
    .scale(x)
    .orient("bottom")
    .ticks(5);
​
var yAxis = d3.svg.axis()
    .scale(y)
    .orient("left")
    .ticks(5);
​
var area = d3.svg.area()
    .x(function(d) { return x(d.date); })
    .y0(height)
    .y1(function(d) { return y(d.users); });
​
var svg = d3.select("body").append("svg")
    .attr("width", width + margin.left + margin.right)
    .attr("height", height + margin.top + margin.bottom)
  .append("g")
    .attr("transform", "translate(" + margin.left + "," + margin.top + ")");
​
x.domain(d3.extent(data, function(d) { return d.date; }));
y.domain(d3.extent(data, function(d) { return d.users; }));
​
svg.append("path")
    .datum(data)
    .attr("class", "area")
    .attr("d", area);
​
svg.append("g")
    .attr("class", "x axis")
    .attr("transform", "translate(0," + height + ")")
    .call(xAxis);
​
svg.append("g")
    .attr("class", "y axis")
    .call(yAxis)
  .append("text")
    .attr("transform", "rotate(-90)")
    .attr("y", 6)
    .attr("dy", ".71em")
    .style("text-anchor", "end")
    .text("Users");
​
    d3.select("#download")
     .on("mouseover", function(){
        var html = d3.select("svg")
            .attr("version", 1.1)
            .attr("xmlns", "https://www.w3.org/2000/svg")
            .node().parentNode.innerHTML;
        d3.select(this)
            .attr("href-lang", "image/svg+xml")
            .attr("href", "data:image/svg+xml;base64,\n" + btoa(html));
    });
</script>
​
    