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HTML

              
                <div id="graph">
  <div id="flags"></div>
  <svg width="1920" height="1080"></svg>
</div>
              
            
!

CSS

              
                body {
  margin: 50px;
  font-family: Arial;
}

svg {
  float: left;
  border: 1px solid black;  
  margin-bottom: 20px;
}
    
.flag {
	width: 16px;
	height: 11px;
  position: absolute;
	background: url(https://res.cloudinary.com/dyqqt0ksz/image/upload/v1470957015/flags_tu28r4.png) no-repeat;
}

.flag.flag-ad {background-position: -16px 0}
.flag.flag-ae {background-position: -32px 0}
.flag.flag-af {background-position: -48px 0}
.flag.flag-ag {background-position: -64px 0}
.flag.flag-ai {background-position: -80px 0}
.flag.flag-al {background-position: -96px 0}
.flag.flag-am {background-position: -112px 0}
.flag.flag-an {background-position: -128px 0}
.flag.flag-ao {background-position: -144px 0}
.flag.flag-ar {background-position: -160px 0}
.flag.flag-as {background-position: -176px 0}
.flag.flag-at {background-position: -192px 0}
.flag.flag-au {background-position: -208px 0}
.flag.flag-aw {background-position: -224px 0}
.flag.flag-az {background-position: -240px 0}
.flag.flag-ba {background-position: 0 -11px}
.flag.flag-bb {background-position: -16px -11px}
.flag.flag-bd {background-position: -32px -11px}
.flag.flag-be {background-position: -48px -11px}
.flag.flag-bf {background-position: -64px -11px}
.flag.flag-bg {background-position: -80px -11px}
.flag.flag-bh {background-position: -96px -11px}
.flag.flag-bi {background-position: -112px -11px}
.flag.flag-bj {background-position: -128px -11px}
.flag.flag-bm {background-position: -144px -11px}
.flag.flag-bn {background-position: -160px -11px}
.flag.flag-bo {background-position: -176px -11px}
.flag.flag-br {background-position: -192px -11px}
.flag.flag-bs {background-position: -208px -11px}
.flag.flag-bt {background-position: -224px -11px}
.flag.flag-bv {background-position: -240px -11px}
.flag.flag-bw {background-position: 0 -22px}
.flag.flag-by {background-position: -16px -22px}
.flag.flag-bz {background-position: -32px -22px}
.flag.flag-ca {background-position: -48px -22px}
.flag.flag-catalonia {background-position: -64px -22px}
.flag.flag-cd {background-position: -80px -22px}
.flag.flag-cf {background-position: -96px -22px}
.flag.flag-cg {background-position: -112px -22px}
.flag.flag-ch {background-position: -128px -22px}
.flag.flag-ci {background-position: -144px -22px}
.flag.flag-ck {background-position: -160px -22px}
.flag.flag-cl {background-position: -176px -22px}
.flag.flag-cm {background-position: -192px -22px}
.flag.flag-cn {background-position: -208px -22px}
.flag.flag-co {background-position: -224px -22px}
.flag.flag-cr {background-position: -240px -22px}
.flag.flag-cu {background-position: 0 -33px}
.flag.flag-cv {background-position: -16px -33px}
.flag.flag-cw {background-position: -32px -33px}
.flag.flag-cy {background-position: -48px -33px}
.flag.flag-cz {background-position: -64px -33px}
.flag.flag-de {background-position: -80px -33px}
.flag.flag-dj {background-position: -96px -33px}
.flag.flag-dk {background-position: -112px -33px}
.flag.flag-dm {background-position: -128px -33px}
.flag.flag-do {background-position: -144px -33px}
.flag.flag-dz {background-position: -160px -33px}
.flag.flag-ec {background-position: -176px -33px}
.flag.flag-ee {background-position: -192px -33px}
.flag.flag-eg {background-position: -208px -33px}
.flag.flag-eh {background-position: -224px -33px}
.flag.flag-england {background-position: -240px -33px}
.flag.flag-er {background-position: 0 -44px}
.flag.flag-es {background-position: -16px -44px}
.flag.flag-et {background-position: -32px -44px}
.flag.flag-eu {background-position: -48px -44px}
.flag.flag-fi {background-position: -64px -44px}
.flag.flag-fj {background-position: -80px -44px}
.flag.flag-fk {background-position: -96px -44px}
.flag.flag-fm {background-position: -112px -44px}
.flag.flag-fo {background-position: -128px -44px}
.flag.flag-fr {background-position: -144px -44px}
.flag.flag-ga {background-position: -160px -44px}
.flag.flag-gb {background-position: -176px -44px}
.flag.flag-gd {background-position: -192px -44px}
.flag.flag-ge {background-position: -208px -44px}
.flag.flag-gf {background-position: -224px -44px}
.flag.flag-gg {background-position: -240px -44px}
.flag.flag-gh {background-position: 0 -55px}
.flag.flag-gi {background-position: -16px -55px}
.flag.flag-gl {background-position: -32px -55px}
.flag.flag-gm {background-position: -48px -55px}
.flag.flag-gn {background-position: -64px -55px}
.flag.flag-gp {background-position: -80px -55px}
.flag.flag-gq {background-position: -96px -55px}
.flag.flag-gr {background-position: -112px -55px}
.flag.flag-gs {background-position: -128px -55px}
.flag.flag-gt {background-position: -144px -55px}
.flag.flag-gu {background-position: -160px -55px}
.flag.flag-gw {background-position: -176px -55px}
.flag.flag-gy {background-position: -192px -55px}
.flag.flag-hk {background-position: -208px -55px}
.flag.flag-hm {background-position: -224px -55px}
.flag.flag-hn {background-position: -240px -55px}
.flag.flag-hr {background-position: 0 -66px}
.flag.flag-ht {background-position: -16px -66px}
.flag.flag-hu {background-position: -32px -66px}
.flag.flag-ic {background-position: -48px -66px}
.flag.flag-id {background-position: -64px -66px}
.flag.flag-ie {background-position: -80px -66px}
.flag.flag-il {background-position: -96px -66px}
.flag.flag-im {background-position: -112px -66px}
.flag.flag-in {background-position: -128px -66px}
.flag.flag-io {background-position: -144px -66px}
.flag.flag-iq {background-position: -160px -66px}
.flag.flag-ir {background-position: -176px -66px}
.flag.flag-is {background-position: -192px -66px}
.flag.flag-it {background-position: -208px -66px}
.flag.flag-je {background-position: -224px -66px}
.flag.flag-jm {background-position: -240px -66px}
.flag.flag-jo {background-position: 0 -77px}
.flag.flag-jp {background-position: -16px -77px}
.flag.flag-ke {background-position: -32px -77px}
.flag.flag-kg {background-position: -48px -77px}
.flag.flag-kh {background-position: -64px -77px}
.flag.flag-ki {background-position: -80px -77px}
.flag.flag-km {background-position: -96px -77px}
.flag.flag-kn {background-position: -112px -77px}
.flag.flag-kp {background-position: -128px -77px}
.flag.flag-kr {background-position: -144px -77px}
.flag.flag-kurdistan {background-position: -160px -77px}
.flag.flag-kw {background-position: -176px -77px}
.flag.flag-ky {background-position: -192px -77px}
.flag.flag-kz {background-position: -208px -77px}
.flag.flag-la {background-position: -224px -77px}
.flag.flag-lb {background-position: -240px -77px}
.flag.flag-lc {background-position: 0 -88px}
.flag.flag-li {background-position: -16px -88px}
.flag.flag-lk {background-position: -32px -88px}
.flag.flag-lr {background-position: -48px -88px}
.flag.flag-ls {background-position: -64px -88px}
.flag.flag-lt {background-position: -80px -88px}
.flag.flag-lu {background-position: -96px -88px}
.flag.flag-lv {background-position: -112px -88px}
.flag.flag-ly {background-position: -128px -88px}
.flag.flag-ma {background-position: -144px -88px}
.flag.flag-mc {background-position: -160px -88px}
.flag.flag-md {background-position: -176px -88px}
.flag.flag-me {background-position: -192px -88px}
.flag.flag-mg {background-position: -208px -88px}
.flag.flag-mh {background-position: -224px -88px}
.flag.flag-mk {background-position: -240px -88px}
.flag.flag-ml {background-position: 0 -99px}
.flag.flag-mm {background-position: -16px -99px}
.flag.flag-mn {background-position: -32px -99px}
.flag.flag-mo {background-position: -48px -99px}
.flag.flag-mp {background-position: -64px -99px}
.flag.flag-mq {background-position: -80px -99px}
.flag.flag-mr {background-position: -96px -99px}
.flag.flag-ms {background-position: -112px -99px}
.flag.flag-mt {background-position: -128px -99px}
.flag.flag-mu {background-position: -144px -99px}
.flag.flag-mv {background-position: -160px -99px}
.flag.flag-mw {background-position: -176px -99px}
.flag.flag-mx {background-position: -192px -99px}
.flag.flag-my {background-position: -208px -99px}
.flag.flag-mz {background-position: -224px -99px}
.flag.flag-na {background-position: -240px -99px}
.flag.flag-nc {background-position: 0 -110px}
.flag.flag-ne {background-position: -16px -110px}
.flag.flag-nf {background-position: -32px -110px}
.flag.flag-ng {background-position: -48px -110px}
.flag.flag-ni {background-position: -64px -110px}
.flag.flag-nl {background-position: -80px -110px}
.flag.flag-no {background-position: -96px -110px}
.flag.flag-np {background-position: -112px -110px}
.flag.flag-nr {background-position: -128px -110px}
.flag.flag-nu {background-position: -144px -110px}
.flag.flag-nz {background-position: -160px -110px}
.flag.flag-om {background-position: -176px -110px}
.flag.flag-pa {background-position: -192px -110px}
.flag.flag-pe {background-position: -208px -110px}
.flag.flag-pf {background-position: -224px -110px}
.flag.flag-pg {background-position: -240px -110px}
.flag.flag-ph {background-position: 0 -121px}
.flag.flag-pk {background-position: -16px -121px}
.flag.flag-pl {background-position: -32px -121px}
.flag.flag-pm {background-position: -48px -121px}
.flag.flag-pn {background-position: -64px -121px}
.flag.flag-pr {background-position: -80px -121px}
.flag.flag-ps {background-position: -96px -121px}
.flag.flag-pt {background-position: -112px -121px}
.flag.flag-pw {background-position: -128px -121px}
.flag.flag-py {background-position: -144px -121px}
.flag.flag-qa {background-position: -160px -121px}
.flag.flag-re {background-position: -176px -121px}
.flag.flag-ro {background-position: -192px -121px}
.flag.flag-rs {background-position: -208px -121px}
.flag.flag-ru {background-position: -224px -121px}
.flag.flag-rw {background-position: -240px -121px}
.flag.flag-sa {background-position: 0 -132px}
.flag.flag-sb {background-position: -16px -132px}
.flag.flag-sc {background-position: -32px -132px}
.flag.flag-scotland {background-position: -48px -132px}
.flag.flag-sd {background-position: -64px -132px}
.flag.flag-se {background-position: -80px -132px}
.flag.flag-sg {background-position: -96px -132px}
.flag.flag-sh {background-position: -112px -132px}
.flag.flag-si {background-position: -128px -132px}
.flag.flag-sk {background-position: -144px -132px}
.flag.flag-sl {background-position: -160px -132px}
.flag.flag-sm {background-position: -176px -132px}
.flag.flag-sn {background-position: -192px -132px}
.flag.flag-so {background-position: -208px -132px}
.flag.flag-somaliland {background-position: -224px -132px}
.flag.flag-sr {background-position: -240px -132px}
.flag.flag-ss {background-position: 0 -143px}
.flag.flag-st {background-position: -16px -143px}
.flag.flag-sv {background-position: -32px -143px}
.flag.flag-sx {background-position: -48px -143px}
.flag.flag-sy {background-position: -64px -143px}
.flag.flag-sz {background-position: -80px -143px}
.flag.flag-tc {background-position: -96px -143px}
.flag.flag-td {background-position: -112px -143px}
.flag.flag-tf {background-position: -128px -143px}
.flag.flag-tg {background-position: -144px -143px}
.flag.flag-th {background-position: -160px -143px}
.flag.flag-tibet {background-position: -176px -143px}
.flag.flag-tj {background-position: -192px -143px}
.flag.flag-tk {background-position: -208px -143px}
.flag.flag-tl {background-position: -224px -143px}
.flag.flag-tm {background-position: -240px -143px}
.flag.flag-tn {background-position: 0 -154px}
.flag.flag-to {background-position: -16px -154px}
.flag.flag-tr {background-position: -32px -154px}
.flag.flag-tt {background-position: -48px -154px}
.flag.flag-tv {background-position: -64px -154px}
.flag.flag-tw {background-position: -80px -154px}
.flag.flag-tz {background-position: -96px -154px}
.flag.flag-ua {background-position: -112px -154px}
.flag.flag-ug {background-position: -128px -154px}
.flag.flag-um {background-position: -144px -154px}
.flag.flag-us {background-position: -160px -154px}
.flag.flag-uy {background-position: -176px -154px}
.flag.flag-uz {background-position: -192px -154px}
.flag.flag-va {background-position: -208px -154px}
.flag.flag-vc {background-position: -224px -154px}
.flag.flag-ve {background-position: -240px -154px}
.flag.flag-vg {background-position: 0 -165px}
.flag.flag-vi {background-position: -16px -165px}
.flag.flag-vn {background-position: -32px -165px}
.flag.flag-vu {background-position: -48px -165px}
.flag.flag-wales {background-position: -64px -165px}
.flag.flag-wf {background-position: -80px -165px}
.flag.flag-ws {background-position: -96px -165px}
.flag.flag-xk {background-position: -112px -165px}
.flag.flag-ye {background-position: -128px -165px}
.flag.flag-yt {background-position: -144px -165px}
.flag.flag-za {background-position: -160px -165px}
.flag.flag-zanzibar {background-position: -176px -165px}
.flag.flag-zm {background-position: -192px -165px}
.flag.flag-zw {background-position: -208px -165px}
              
            
!

JS

              
                var contiguity;

$.getJSON('https://raw.githubusercontent.com/DealPete/forceDirected/master/countries.json', function(data) {
  console.log(data);
  contiguity = data;  
  contiguity.nodes.forEach(function(element, index) {
    element['id'] = index;
  })
  drawForceDirectedGraph();
});

function drawForceDirectedGraph() {
  var svg = d3.select("svg"),
      width = +svg.attr("width"),
      height = +svg.attr("height");

  var simulation = d3.forceSimulation()
      .force("link", d3.forceLink().id(function (d) {
          return d.id;
      }))
      .force("charge", d3.forceManyBody().strength(-10))
      .force("center", d3.forceCenter(width / 2, height / 2));

  var link = svg.append("g")
      .attr("class", "links")
      .selectAll("line")
      .data(contiguity.links)
      .enter().append("line")
      .attr("stroke", "#aaa");
  
  simulation
      .nodes(contiguity.nodes)
      .on("tick", ticked);

  var node = d3.select("#flags")
      .selectAll(".flag-nodes")
      .data(contiguity.nodes)
            .enter()
              .append("div")
              .attr("class", function(d){
                return "flag flag-" + d.code;
              })
              .call(d3.drag()
              .on("start", dragstarted)
              .on("drag", dragged)
              .on("end", dragended)
            )
  
simulation.force("link")
    .links(contiguity.links);

  
function ticked() {
  link
        .attr("x1", function (d) {
            return d.source.x;
        })
        .attr("y1", function (d) {
            return d.source.y;
        })
        .attr("x2", function (d) {
            return d.target.x;
        })
        .attr("y2", function (d) {
            return d.target.y;
        });

  node
            .style("left", function(d) {
              return (d.x + 50) + 'px';
            })
            .style("top", function(d) {
              return (d.y + 50) + 'px';
            });
}

function dragstarted(d) {
    if (!d3.event.active) simulation.alphaTarget(0.3).restart();
    d.fx = d.x;
    d.fy = d.y;
}

function dragged(d) {
    d.fx = d3.event.x;
    d.fy = d3.event.y;
}

function dragended(d) {
    if (!d3.event.active) simulation.alphaTarget(0);
    d.fx = null;
    d.fy = null;
}
}
              
            
!
999px

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