Map showing the density of members of italian Parliament per region using d3.js The density is calculated like [numbers of members of a region / population of the region] Chart made thanks to Camera dei Deputati Open Data
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August 29, 2015 14:11
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Density of Members of Italian Parliament per region (on map)
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svg { | |
background: white; | |
} | |
.stroke { | |
fill: none; | |
stroke: #000; | |
stroke-width: 3px; | |
} | |
.fill { | |
fill: #fff; | |
} | |
.graticule { | |
fill: none; | |
stroke: #777; | |
stroke-width: .5px; | |
stroke-opacity: .5; | |
} | |
.land { | |
fill: #222; | |
} | |
.boundary { | |
fill: none; | |
stroke: #fff; | |
stroke-width: .5px; | |
} | |
.region { | |
fill: white; | |
stroke: black; | |
stroke-width: 0.1px; | |
} | |
.d3-tip { | |
line-height: 1; | |
font-weight: bold; | |
padding: 5px; | |
background-color:white; | |
border: 1px solid black; | |
color: black; | |
border-radius: 2px; | |
position: fixed; | |
top: 20px; | |
left: 100px; | |
} | |
/* Creates a small triangle extender for the tooltip */ | |
.d3-tip:after { | |
box-sizing: border-box; | |
display: inline; | |
font-size: 10px; | |
width: 100%; | |
line-height: 1; | |
color: rgba(0, 0, 0, 0.8); | |
content: "\25BC"; | |
position: absolute; | |
text-align: center; | |
} | |
/* Style northward tooltips differently */ | |
.d3-tip.n:after { | |
margin: -1px 0 0 0; | |
top: 100%; | |
left: 0; | |
} |
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<!DOCTYPE html> | |
<html> | |
<head> | |
<meta charset="utf-8"> | |
<title>Density of Members of Italian Parliament per region (on map)</title> | |
<meta name="description" content="Density of Members of Italian Parliament per region (on map)" /> | |
<link type="text/css" href="index.css" rel="stylesheet"/> | |
<script src="http://d3js.org/d3.v3.min.js"></script> | |
<script src="http://d3js.org/d3.geo.projection.v0.min.js"></script> | |
<script src="http://d3js.org/topojson.v1.min.js"></script> | |
<script src="http://labratrevenge.com/d3-tip/javascripts/d3.tip.v0.6.3.js"></script> | |
</head> | |
<body> | |
<script src="index.js"></script> | |
</body> | |
</html> |
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var width = 960, | |
height = 500; | |
var projection = d3.geo.robinson() | |
.scale(1800) | |
.translate([width / 5, height*3.5]) | |
.precision(0.1); | |
var path = d3.geo.path() | |
.projection(projection); | |
var graticule = d3.geo.graticule(); | |
var vis = d3.select("body").append("svg") | |
.attr("width", width) | |
.attr("height", height); | |
var svg = vis.append('g'); | |
var zoom = d3.behavior.zoom() | |
.scaleExtent([1, 30]) | |
.on("zoom", zoomHandler); | |
function zoomHandler() { | |
svg.attr("transform", "translate(" + zoom.translate() + ")scale(" + zoom.scale() + ")"); | |
} | |
vis.call(zoom); | |
svg.append("text") | |
.attr("x", (960 / 2)) | |
.attr("y", (15)) | |
.attr("text-anchor", "middle") | |
.style("font-size", "16px") | |
.style("text-decoration", "underline") | |
.text("Density of Members of Italian Parliament per region (on map)"); | |
var color = d3.scale.quantize() | |
.domain([7,14]) | |
.range(["#ffffbf","#d9ef8b","#91cf60","#1a9850"]); | |
var data = {"VALLE D'AOSTA":0, "PIEMONTE":0, "LOMBARDIA":0, "TRENTINO ALTO-ADIGE":0, "FRIULI-VENEZIA-GIULIA":0, "VENETO":0,"EMILIA-ROMAGNA":0, "LIGURIA":0, "TOSCANA":0, "MARCHE":0, "UMBRIA":0, "LAZIO":0, "CAMPANIA":0, "ABRUZZO":0, "BASILICATA":0, "PUGLIA":0, "MOLISE":0, "CALABRIA":0, "SICILIA":0, "SARDEGNA":0}; | |
var states = {}; | |
var population = {}; | |
d3.json("http://wafi.iit.cnr.it/webvis/tmp/dati_camera/basic_anagrafica.json", function(error, json) { | |
if (error) return console.warn(error); | |
json.results.deputati.forEach( function(d){ | |
if (d.regione) { | |
data[d.regione.value] = data[d.regione.value] + 1; | |
} | |
}); | |
d3.json("http://wafi.iit.cnr.it/webvis/tmp/dati_camera/regioni_population.json", function(error, pop) { | |
if (error) return console.warn(error); | |
pop.forEach( function(p){ | |
population[p.Region] = p.Population; | |
}); | |
d3.json("http://wafi.iit.cnr.it/webvis/tmp/dati_camera/regioni.topo.json", function(error, world) { | |
var tip = d3.tip() | |
.attr('class', 'd3-tip') | |
.offset([0, 0]) | |
.html(function(d) { | |
return(d.properties.NOME_REG+':'+d3.format(".3f")(data[d.properties.NOME_REG]/population[d.properties.NOME_REG]*100)+'%'); | |
}) ; | |
vis.call(tip); | |
var regions = topojson.feature(world, world.objects.reg2011).features; | |
topo = regions; | |
var region = svg.selectAll(".region").data(topo); | |
region.enter().insert("path") | |
.attr("class", "region") | |
.attr("d", path) | |
.style("fill", function(d){ return color(data[d.properties.NOME_REG]/population[d.properties.NOME_REG]*100000);}) | |
.on('mouseover', tip.show) | |
.on('mouseout', tip.hide); | |
}); | |
}); | |
}); |
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