forked from dnprock's block: US States Map
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July 17, 2016 22:56
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Per-Capita Police Involved Deaths by State
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license: gpl-3.0 |
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<!DOCTYPE html> | |
<meta charset="utf-8"> | |
<style> | |
body { | |
font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; | |
width: 960px; | |
height: 500px; | |
position: relative; | |
} | |
/* stylesheet for your custom graph */ | |
.states { | |
fill: none; | |
stroke: #fff; | |
stroke-linejoin: round; | |
} | |
.states-choropleth { | |
fill: #ccc; | |
} | |
#tooltip-container { | |
position: absolute; | |
background-color: #fff; | |
color: #000; | |
padding: 10px; | |
border: 1px solid; | |
display: none; | |
} | |
.tooltip_key { | |
font-weight: bold; | |
} | |
.tooltip_value { | |
margin-left: 20px; | |
float: right; | |
} | |
</style> | |
<div id="tooltip-container"></div> | |
<div id="canvas-svg"></div> | |
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script> | |
<script src="//cdnjs.cloudflare.com/ajax/libs/topojson/1.1.0/topojson.min.js"></script> | |
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script> | |
<script> | |
d3.csv("https://numeracy.co/projects/4q0B8jr8qsF/police-involved-deaths-by-state.csv", function(err, data) { | |
var config = {"color1":"#d3e5ff","color2":"#08306B","stateDataColumn":"state","valueDataColumn":"deaths_per_mil"} | |
var WIDTH = 800, HEIGHT = 500; | |
var COLOR_COUNTS = 9; | |
var SCALE = 0.7; | |
function Interpolate(start, end, steps, count) { | |
var s = start, | |
e = end, | |
final = s + (((e - s) / steps) * count); | |
return Math.floor(final); | |
} | |
function Color(_r, _g, _b) { | |
var r, g, b; | |
var setColors = function(_r, _g, _b) { | |
r = _r; | |
g = _g; | |
b = _b; | |
}; | |
setColors(_r, _g, _b); | |
this.getColors = function() { | |
var colors = { | |
r: r, | |
g: g, | |
b: b | |
}; | |
return colors; | |
}; | |
} | |
function hexToRgb(hex) { | |
var result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hex); | |
return result ? { | |
r: parseInt(result[1], 16), | |
g: parseInt(result[2], 16), | |
b: parseInt(result[3], 16) | |
} : null; | |
} | |
function valueFormat(d) { | |
if (d > 1000000000) { | |
return Math.round(d / 1000000000 * 10) / 10 + "B"; | |
} else if (d > 1000000) { | |
return Math.round(d / 1000000 * 10) / 10 + "M"; | |
} else if (d > 1000) { | |
return Math.round(d / 1000 * 10) / 10 + "K"; | |
} else { | |
return d; | |
} | |
} | |
var COLOR_FIRST = config.color1, COLOR_LAST = config.color2; | |
var rgb = hexToRgb(COLOR_FIRST); | |
var COLOR_START = new Color(rgb.r, rgb.g, rgb.b); | |
rgb = hexToRgb(COLOR_LAST); | |
var COLOR_END = new Color(rgb.r, rgb.g, rgb.b); | |
var MAP_STATE = config.stateDataColumn; | |
var MAP_VALUE = config.valueDataColumn; | |
var width = WIDTH, | |
height = HEIGHT; | |
var valueById = d3.map(); | |
var startColors = COLOR_START.getColors(), | |
endColors = COLOR_END.getColors(); | |
var colors = []; | |
for (var i = 0; i < COLOR_COUNTS; i++) { | |
var r = Interpolate(startColors.r, endColors.r, COLOR_COUNTS, i); | |
var g = Interpolate(startColors.g, endColors.g, COLOR_COUNTS, i); | |
var b = Interpolate(startColors.b, endColors.b, COLOR_COUNTS, i); | |
colors.push(new Color(r, g, b)); | |
} | |
var quantize = d3.scale.quantize() | |
.domain([0, 1.0]) | |
.range(d3.range(COLOR_COUNTS).map(function(i) { return i })); | |
var path = d3.geo.path(); | |
var svg = d3.select("#canvas-svg").append("svg") | |
.attr("width", width) | |
.attr("height", height); | |
d3.tsv("https://s3-us-west-2.amazonaws.com/vida-public/geo/us-state-names.tsv", function(error, names) { | |
name_id_map = {}; | |
id_name_map = {}; | |
for (var i = 0; i < names.length; i++) { | |
name_id_map[names[i].name] = names[i].id; | |
id_name_map[names[i].id] = names[i].name; | |
} | |
data.forEach(function(d) { | |
var id = name_id_map[d[MAP_STATE]]; | |
valueById.set(id, +d[MAP_VALUE]); | |
}); | |
quantize.domain([d3.min(data, function(d){ return +d[MAP_VALUE] }), | |
d3.max(data, function(d){ return +d[MAP_VALUE] })]); | |
d3.json("https://s3-us-west-2.amazonaws.com/vida-public/geo/us.json", function(error, us) { | |
svg.append("g") | |
.attr("class", "states-choropleth") | |
.selectAll("path") | |
.data(topojson.feature(us, us.objects.states).features) | |
.enter().append("path") | |
.attr("transform", "scale(" + SCALE + ")") | |
.style("fill", function(d) { | |
if (valueById.get(d.id)) { | |
var i = quantize(valueById.get(d.id)); | |
var color = colors[i].getColors(); | |
return "rgb(" + color.r + "," + color.g + | |
"," + color.b + ")"; | |
} else { | |
return ""; | |
} | |
}) | |
.attr("d", path) | |
.on("mousemove", function(d) { | |
var html = ""; | |
html += "<div class=\"tooltip_kv\">"; | |
html += "<span class=\"tooltip_key\">"; | |
html += id_name_map[d.id]; | |
html += "</span>"; | |
html += "<span class=\"tooltip_value\">"; | |
html += (valueById.get(d.id) ? valueFormat(valueById.get(d.id)) : ""); | |
html += ""; | |
html += "</span>"; | |
html += "</div>"; | |
$("#tooltip-container").html(html); | |
$(this).attr("fill-opacity", "0.8"); | |
$("#tooltip-container").show(); | |
var coordinates = d3.mouse(this); | |
var map_width = $('.states-choropleth')[0].getBoundingClientRect().width; | |
if (d3.event.layerX < map_width / 2) { | |
d3.select("#tooltip-container") | |
.style("top", (d3.event.layerY + 15) + "px") | |
.style("left", (d3.event.layerX + 15) + "px"); | |
} else { | |
var tooltip_width = $("#tooltip-container").width(); | |
d3.select("#tooltip-container") | |
.style("top", (d3.event.layerY + 15) + "px") | |
.style("left", (d3.event.layerX - tooltip_width - 30) + "px"); | |
} | |
}) | |
.on("mouseout", function() { | |
$(this).attr("fill-opacity", "1.0"); | |
$("#tooltip-container").hide(); | |
}); | |
svg.append("path") | |
.datum(topojson.mesh(us, us.objects.states, function(a, b) { return a !== b; })) | |
.attr("class", "states") | |
.attr("transform", "scale(" + SCALE + ")") | |
.attr("d", path); | |
}); | |
}); | |
}); | |
</script> |
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