Clickable Bubble Chart of Roman Administrative Units

README.md

Click on any circle to zoom in or out. Code by @mbostock . Data adapted from Wikipedia with relative sizes mostly made up for effect.

flare.json

{
 "name": "Imperium Romanorum",
 "children": [
    {
            "name": "Urbs Romae",
            "children": [
                { "name": "Regio I Porta Capena","size":10 },
                { "name": "Regio II Caelimontium","size":10 },
                { "name": "Regio III Isis et Serapis","size":10 },
                { "name": "Regio IV Templum Pacis","size":10 },
                { "name": "Regio V Esquiliae","size":10 },
                { "name": "Regio VI Alta Semita","size":10 },
                { "name": "Regio VII Via Lata","size":10 },
                { "name": "Regio VIII Forum Romanum","size":10 },
                { "name": "Regio IX Circus Flaminius","size":10 },
                { "name": "Regio X Palatium","size":10 },
                { "name": "Regio XI Circus Maximus","size":10 },
                { "name": "Regio XII Piscina Publica","size":10 },
                { "name": "Regio XIII Aventinus","size":10 },
                { "name": "Regio XIV Transtiberim","size":10 }
 
            ]
        },{
            "name": "Italia",
            "children": [
                { "name": "Regio I Latium et Campania","size":35 },
                { "name": "Regio II Apulia et Calabria","size":35 },
                { "name": "Regio III Lucania et Brutium","size":35 },
                { "name": "Regio IV Samnium","size":35 },
                { "name": "Regio V Picenum","size":35 },
                { "name": "Regio VI Umbria et Ager Gallicus","size":35 },
                { "name": "Regio VII Etruria","size":35 },
                { "name": "Regio VIII Aemilia","size":35 },
                { "name": "Regio IX Liguria","size":35 },
                { "name": "Regio X Venetia et Histria","size":35 },
                { "name": "Regio XI Transpadana","size":35 }
            ]
        },{
            "name": "Senatorial Provinces",
            "children": [
                { "name": "Sicilia","size":100 },
                { "name": "Corsica et Sardinia","size":80 },
                { "name": "Narbonensis","size":100},
                { "name": "Baetica","size":100},
                { "name": "Africa Proconsularis","size":150},
                { "name": "Cyrenaica et Creta","size":150},
                { "name": "Cyprus","size":50},
                { "name": "Asia","size":75},
                { "name": "Bithynia et Pontus","size":75},
                { "name": "Macedonia","size":60},
                { "name": "Achaia","size":60},
                { "name": "Epirus","size":60}
            ]
        },
        {
            "name": "Imperial Provinces",
            "children": [
                { "name": "Alpes Maritimae", "size":30 },
                { "name": "Alpes Cotiae", "size":30 },
                { "name": "Alpes Poeniae", "size":30 },
                { "name": "Germania Superior", "size":30 },
                { "name": "Germania Inferior", "size":30 },
                { "name": "Belgica", "size":40 },
                { "name": "Britannia", "size":50 },
                { "name": "Lugdunensis", "size":40 },
                { "name": "Aquitania", "size":40 },
                { "name": "Tarraconensis", "size":60 },
                { "name": "Lusitania", "size":50 },
                { "name": "Mauretania Tingitana", "size":30 },
                { "name": "Mauretania Caesariensis", "size":30 },
                { "name": "Aegyptus", "size":70 },
                { "name": "Arabia Petraea", "size":40 },
                { "name": "Iudaea", "size":30 },
                { "name": "Syria", "size":50 },
                { "name": "Mesopotamia", "size":40 },
                { "name": "Assyria", "size":40 },
                { "name": "Armenia", "size":30 },
                { "name": "Cappadocia", "size":40 },
                { "name": "Cilicia", "size":30 },
                { "name": "Galatia", "size":30 },
                { "name": "Lycia et Pamphylia", "size":30 },
                { "name": "Thracia", "size":30 },
                { "name": "Moesia Inferior", "size":30 },
                { "name": "Moesia Superior", "size":30 },
                { "name": "Dacia", "size":40 },
                { "name": "Dalmatia", "size":30 },
                { "name": "Panonia Inferior", "size":30 },
                { "name": "Panonia Superior", "size":30 },
                { "name": "Noricum", "size":30 },
                { "name": "Raetia", "size":30 }
]
},
        {
            "name": "Client States",
            "children": [
                { "name": "Regnum Bospori", "size":30 }
            ]
        }
   ]
  }

index.html

<!DOCTYPE html>
<meta charset="utf-8">
<style>

.node {
  cursor: pointer;
}

.node:hover {
  stroke: #000;
  stroke-width: 1.5px;
}

.node--root {
  stroke: #777;
  stroke-width: 2px;
}

.node--leaf {
  fill: white;
}

.label {
  font: 11px "Helvetica Neue", Helvetica, Arial, sans-serif;
  text-anchor: middle;
  text-shadow: 0 1px 0 #fff, 1px 0 0 #fff, -1px 0 0 #fff, 0 -1px 0 #fff;
}

.label,
.node--root,
.node--leaf {
  pointer-events: none;
}

</style>
<body>
<script src="http://d3js.org/d3.v3.min.js"></script>
<script>

var margin = 10,
    outerDiameter = 960,
    innerDiameter = outerDiameter - margin - margin;

var x = d3.scale.linear()
    .range([0, innerDiameter]);

var y = d3.scale.linear()
    .range([0, innerDiameter]);

var color = d3.scale.linear()
    .domain([-1, 5])
    .range(["hsl(152,80%,80%)", "hsl(228,30%,40%)"])
    .interpolate(d3.interpolateHcl);

var pack = d3.layout.pack()
    .padding(2)
    .size([innerDiameter, innerDiameter])
    .value(function(d) { return d.size; })

var svg = d3.select("body").append("svg")
    .attr("width", outerDiameter)
    .attr("height", outerDiameter)
  .append("g")
    .attr("transform", "translate(" + margin + "," + margin + ")");

d3.json("flare.json", function(error, root) {
  var focus = root,
      nodes = pack.nodes(root);

  svg.append("g").selectAll("circle")
      .data(nodes)
    .enter().append("circle")
      .attr("class", function(d) { return d.parent ? d.children ? "node" : "node node--leaf" : "node node--root"; })
      .attr("transform", function(d) { return "translate(" + d.x + "," + d.y + ")"; })
      .attr("r", function(d) { return d.r; })
      .style("fill", function(d) { return d.children ? color(d.depth) : null; })
      .on("click", function(d) { return zoom(focus == d ? root : d); });

  svg.append("g").selectAll("text")
      .data(nodes)
    .enter().append("text")
      .attr("class", "label")
      .attr("transform", function(d) { return "translate(" + d.x + "," + d.y + ")"; })
      .style("fill-opacity", function(d) { return d.parent === root ? 1 : 0; })
      .style("display", function(d) { return d.parent === root ? null : "none"; })
      .text(function(d) { return d.name; });

  d3.select(window)
      .on("click", function() { zoom(root); });

  function zoom(d, i) {
    var focus0 = focus;
    focus = d;

    var k = innerDiameter / d.r / 2;
    x.domain([d.x - d.r, d.x + d.r]);
    y.domain([d.y - d.r, d.y + d.r]);
    d3.event.stopPropagation();

    var transition = d3.selectAll("text,circle").transition()
        .duration(d3.event.altKey ? 7500 : 750)
        .attr("transform", function(d) { return "translate(" + x(d.x) + "," + y(d.y) + ")"; });

    transition.filter("circle")
        .attr("r", function(d) { return k * d.r; });

    transition.filter("text")
      .filter(function(d) { return d.parent === focus || d.parent === focus0; })
        .style("fill-opacity", function(d) { return d.parent === focus ? 1 : 0; })
        .each("start", function(d) { if (d.parent === focus) this.style.display = "inline"; })
        .each("end", function(d) { if (d.parent !== focus) this.style.display = "none"; });
  }
});

d3.select(self.frameElement).style("height", outerDiameter + "px");

</script>

thumbnail.png

how to get onlt leafnode values on mouseover

example
tooltip="name": "Alpes Cotiae",
"size":30

from the array of children leaf nodes we need get only one(on mouse over of any white buble )