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Created June 4, 2016 21:20
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New York City Tree Density
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index.html
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.2.4/jquery.min.js"></script>
<script src="//d3js.org/d3.v3.min.js"></script>
<script src="//d3js.org/topojson.v1.min.js"></script>
<script src="//cdn.rawgit.com/mourner/rbush/master/rbush.js"></script>
<script src="//cdn.rawgit.com/newsappsio/spam/master/spam.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/d3-legend/1.10.0/d3-legend.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/d3-legend/1.10.0/d3-legend.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" rel="stylesheet">
<link href='https://fonts.googleapis.com/css?family=Roboto' rel='stylesheet' type='text/css'>
<!DOCTYPE html>
<meta charset="utf-8" />
<style>
select {
"position": absolute,
}
.legend {
display: table;
margin: 0 auto;
font-family: "Roboto", sans-serif;
font-size: 14px;
width: 400px;
height: 50px;
font-weight: normal;
}
</style>
<body>
<div>
<select id="selectMenu" style="position:absolute; left:80px; top:120px;">
<option>Density by Population</option>
<option>Density by Area</option>
</select>
</div>
<div style="position:absolute; left:80px; top:20px; font-family:Roboto; font-weight:bold; font-size:30px;">
New York City Tree Density<br/>by Neighborhood
</div>
<div id="mapHolder">
</div>
<script type='text/javascript'>
d3.select("#selectMenu")
.on("change", criteriaChanged);
function criteriaChanged() {
var entity_selection = document.getElementById('selectMenu');
var newIndex = entity_selection.selectedIndex;
var newValue = entity_selection[newIndex].text;
d3.select("canvas").remove();
paint(newValue);
}
var tree_by_area_color = d3.scale.linear()
.domain([0, 5845])
.range(['#f7fcf5', '#00441b']);
var tree_by_population_color = d3.scale.linear()
.domain([0.003144, 0.0209, 0.03466, 0.043656, 0.054486, 0.075988, 0.1120, 3.024])
.range(['#f7fbff','#deebf7','#c6dbef','#9ecae1','#6baed6','#4292c6','#2171b5','#084594']);
var colorvar = 'ntrees';
paint("Density by Population");
color_old = d3.scale.linear()
.domain([0, 5000])
.range(['#f7fcf5', '#00441b']);
function color_with_nulls(prop) {
if(isNaN(prop)) {
return "#eee";
}
else if(prop == 0) {
return '#eee';
}
else {
return color_old(prop);
}
}
function color(selection, d) {
if(isNaN(d.properties.ntrees / d.properties.area)) {
return "#eee";
}
else if(d.properties.ntrees / d.properties.area == 0) {
return '#eee';
}
else {
if (selection == "Density by Area") {
return tree_by_area_color(d.properties.ntrees / d.properties.area);
}
else {
return tree_by_population_color(d.properties.ntrees / d.properties.pop2010);
}
}
}
function replaceAll(str, find, replace) {
return str.replace(new RegExp(find, 'g'), replace);
}
var mouseX, mouseY;
var hover = null;
var tooltip = d3.select("body").append("div")
.attr("class", "tooltip")
.style("opacity", 1);
document.onmousemove = handleMouseMove;
function handleMouseMove(event) {
mouseX = event.pageX;
mouseY = event.pageY;
tooltip
.style("left", mouseX - 100 + "px")
.style("top", mouseY + 25 + "px")
}
function paint(selection){
d3.json("merge_clean.json", function(error, data) {
var map = new StaticCanvasMap({
element: "#mapHolder",
width: 800,
height: 800,
projection: d3.geo.mercator()
.center([-73.925, 40.79])
.scale(80000),
data: [{
features: data,
static: {
paintfeature: function(parameters, d) {
parameters.context.fillStyle = color(selection, d);
parameters.context.fill();
}
},
dynamic: {
postpaint: function(parameters) {
if (!hover) {
tooltip.style("opacity", 0);
return
}
parameters.context.beginPath();
parameters.context.lineWidth = 1 / parameters.scale;
parameters.path(hover);
parameters.context.stroke();
tooltip.style("opacity", 1)
.html('<div style="padding:5px; background:#eee; border:1px solid #333; border-radius:5px;">' +
"<strong>Neighborhood:&nbsp;</strong>" +
"<span>"+ hover.properties.NTAName +"</span><br/>" +
"<strong>Population (2010):&nbsp;</strong>" +
"<span>"+ hover.properties.pop2010 + "</span><br />" +
"<strong>Number of Trees:&nbsp;</strong>" +
"<span>" + hover.properties.ntrees + "</span><br/>" +
"<strong>Area:&nbsp;</strong>" +
"<span>" + hover.properties.area + "</span><br/>" +
"<strong>Top Five Species:&nbsp;</strong>" +
"<span><br/><ol><li>"+ replaceAll(hover.properties.top5, ";", "</li><li>") +"</li></ol></span>"
+ "</div>")
}
},
events: {
hover: function(parameters, d) {
hover = d;
parameters.map.paint()
}
}
}
]
});
map.init();
d3.select(".legend").remove();
d3.select("body").append("svg")
.attr({
"class": "legend"
})
.style({
"position": "absolute",
"left": 40,
"top": 40
});
if(selection == "Density by Population") {
var legend = d3.legend.color()
.shapeHeight(15)
.shapeWidth(40)
.shapePadding(0)
.cells([0.003144, 0.0209, 0.03466, 0.043656, 0.054486, 0.075988, 0.1120, 3.024])
.labelOffset(5)
.labelFormat(d3.format('.03f'))
.orient("horizontal")
.labelAlign("center")
.scale(tree_by_population_color);
d3.select(".legend")
.call(legend)
.style({
"position": "absolute",
"left": 80,
"top": 160
});
}
if(selection == "Density by Area") {
var legend = d3.legend.color()
.shapeHeight(15)
.shapeWidth(40)
.shapePadding(0)
.cells(8)
.labelOffset(5)
.labelFormat(d3.format('.00f'))
.orient("horizontal")
.labelAlign("center")
.scale(tree_by_area_color);
d3.select(".legend")
.call(legend)
.style({
"position": "absolute",
"left": 80,
"top": 160
});
}
d3.select(".legend_label").remove();
d3.select("body").append("div")
.attr("class", "legend_label")
.style({
"position": "absolute",
"left": "260px",
"top": "121px",
"font-family": "Roboto",
"font-weight": "bold",
"font-size": "14px"
})
.text(function(d) {
if(selection == "Density by Population") {
return "(Trees / Person)";
}
else {
return "(Trees / Square Mile)"
}
});
});
}
</script>
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merge_clean.json
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