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index.html
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<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>SB 509 impact</title>
<script src="https://d3js.org/d3.v3.min.js" charset="utf-8"></script>
<script src="https://d3js.org/topojson.v1.min.js"></script>
<link href='https://api.tiles.mapbox.com/mapbox.js/v1.6.2/mapbox.css' rel='stylesheet' />
<script src="leaflet-0.7.2/leaflet.js" type="text/javascript"></script>
<script src='https://api.tiles.mapbox.com/mapbox.js/v1.6.2/mapbox.js'></script>
</head>
<body>
<style type="text/css">
html,
body,
#map {
position: relative;
height: 100%;
width: 100%;
margin: 0;
padding: 0;
}
.info {
padding: 6px 8px;
font: 14px/16px Arial, Helvetica, sans-serif;
background: white;
background: rgba(255,255,255,0.8);
box-shadow: 0 0 15px rgba(0,0,0,0.2);
border-radius: 5px;
max-width: 80%;
}
.info h4 {
margin: 0 0 5px;
color: #777;
}
.legend {
text-align: left;
line-height: 18px;
color: #ddd;
background-color: #2b2b2b;
border: 2px white solid;
max-width: 100%;
}
.legend i {
min-width: 20px;
max-width: 20%;
height: 18px;
float: left;
margin-right: 8px;
opacity: 0.6;
}
</style>
<div id="map"></div>
<script type="text/javascript" src="sb509.js"></script>
<script type="text/javascript">
var formatter = d3.format(",.2f");
var northEast = L.latLng(44.878, -78.231),
southWest = L.latLng(30.78, -106.122),
bounds = L.latLngBounds(southWest, northEast);
var map = L.map('map', {scrollWheelZoom: false}).setView([38.494, -90.722], 9).setMaxBounds(bounds);
var tiles = L.mapbox.tileLayer('stlpr.hi06d4b5')
.addTo(map);
var info = L.control();
info.onAdd = function (map) {
this._div = L.DomUtil.create('div', 'info');
this.update();
return this._div;
};
info.update = function (props) {
this._div.innerHTML = '<h4>SB 509 impact</h4>' + (props ?
'<b>' + props.sb509_dist + '</b><br />' + (props.sb509_new ? 'This district\'s initial appropriation was $' + formatter(props.sb509_old) + ' and SB 509\'s tax cut would cost it $' + formatter(props.sb509_old - props.sb509_new) + '.<br />That\'s ' + formatter(Math.abs((props.sb509_new - props.sb509_old) / props.sb509_old)*100) + '%' : '' ) : 'Hover over a district to see its old appropriation and its appropriation if SB 509 becomes law.');
};
info.addTo(map);
function getColor(d) {
return d > 20 ? '#bd0026' :
d > 15 ? '#f03b20' :
d > 10 ? '#fd8d3c' :
d > 5 ? '#fecc5c' :
d > 0 ? '#ffffb2' :
'#333';
}
function style(feature) {
var percentage = Math.abs((feature.properties.sb509_new - feature.properties.sb509_old) / feature.properties.sb509_old)*100;
return {
weight: 1,
opacity: .6,
color: '#eee',
fillOpacity: 0.6,
fillColor: getColor(percentage)
};
}
function highlightFeature(e) {
var layer = e.target;
layer.setStyle({
weight: 5,
color: '#666',
dashArray: '',
fillOpacity: 0.8
});
if (!L.Browser.ie && !L.Browser.opera) {
layer.bringToFront();
}
info.update(layer.feature.properties);
}
var geojson;
function resetHighlight(e) {
geojson.resetStyle(e.target);
info.update();
}
function zoomToFeature(e) {
map.fitBounds(e.target.getBounds());
}
function onEachFeature(feature, layer) {
layer.on({
mouseover: highlightFeature,
mouseout: resetHighlight,
click: highlightFeature
});
}
var geojson;
geojson = L.geoJson(data, {
style: style,
onEachFeature: onEachFeature
}).addTo(map);
var legend = L.control({position: 'bottomright'});
legend.onAdd = function (map) {
var div = L.DomUtil.create('div', 'info legend'),
grades = [0, 5, 10, 15, 20],
labels = [],
from, to;
for (var i = 0; i < grades.length; i++) {
from = grades[i];
to = grades[i + 1];
labels.push(
'<i style="background:' + getColor(grades[i] +1) + '"></i> ' +
((from == 0) ? 'Less than ' + to + '%' : from + (to ? '–' + to + '%' : '% or more')));
}
div.innerHTML = labels.join('<br>');
return div;
};
legend.addTo(map);
</script>
</body>
</html>