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index.html
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<!DOCTYPE html>
<html>
<head>
<meta charset=utf-8 />
<title>Layers</title>
<meta name='viewport' content='width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no' />
<script src='https://api.tiles.mapbox.com/mapbox.js/v1.6.1/mapbox.js'></script>
<link href='https://api.tiles.mapbox.com/mapbox.js/v1.6.1/mapbox.css' rel='stylesheet' />
<style>
body { margin:0; padding:0; }
#map { position:absolute; top:0; bottom:0; width:100%; }
</style>
</head>
<body>
<style>
#map-ui {
position: absolute;
top: 75px;
left: 10px;
list-style: none;
margin: 0;
padding: 0;
z-index: 100;
}
#map-ui a {
font: normal 13px/18px 'Helvetica Neue', Helvetica, sans-serif;
background: #FFF;
color: #3C4E5A;
display: block;
margin: 0;
padding: 0;
border: 1px solid #BBB;
border-bottom-width: 0;
min-width: 138px;
padding: 10px;
text-decoration: none;
}
#map-ui a:hover {
background: #ECF5FA;
}
#map-ui li:last-child a {
border-bottom-width: 1px;
-webkit-border-radius: 0 0 3px 3px;
border-radius: 0 0 3px 3px;
}
#map-ui li:first-child a {
-webkit-border-radius: 3px 3px 0 0;
border-radius: 3px 3px 0 0;
}
#map-ui a.active {
background: #000;
border-color: #000;
border-top-color: #FFF;
color: #FFF;
}
</style>
<ul id='map-ui'></ul>
<div id='map'></div>
<script>
var map = L.map('map').setView([-94.4385,40.9135], 4);
var ui = document.getElementById('map-ui');
addLayer(L.mapbox.tileLayer('alexbhill.county-to-county'), 'Net Flow', 1);
addLayer(L.mapbox.tileLayer('alexbhill.county-to-county'), 'In Flow', 2);
addLayer(L.mapbox.tileLayer('alexbhill.county-to-county'), 'Out Flow', 3);
function addLayer(layer, name, zIndex) {
layer
.setZIndex(zIndex)
.addTo(map);
// Create a simple layer switcher that toggles layers on
// and off.
var item = document.createElement('li');
var link = document.createElement('a');
link.href = '#';
link.className = 'active';
link.innerHTML = name;
link.onclick = function(e) {
e.preventDefault();
e.stopPropagation();
if (map.hasLayer(layer)) {
map.removeLayer(layer);
this.className = '';
} else {
map.addLayer(layer);
this.className = 'active';
}
};
item.appendChild(link);
ui.appendChild(item);
}
</script>
</body>
</html>