Teste Nox

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

.link {
  stroke: #3C4856;
  stroke-width: 1.5;
  opacity: 0.5;
}

.node text {
  pointer-events: none;
  font: 15px sans-serif;
  fill: #212B7B;
  opacity: 0.8;
}

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

var width = 1200,
    height = 600

var svg = d3.select("body").append("svg")
    .attr("width", width)
    .attr("height", height);
    
svg.append("rect")
    .attr("width", "100%")
    .attr("height", "100%")
    .attr("fill", "lightgrey");

var force = d3.layout.force()
    .gravity(.001)
    .distance(260)
    .charge(1)
    .size([width, height]);

d3.json("noxteam.json", function(error, json) {
  force
      .nodes(json.nodes)
      .links(json.links)
      .start();

var link = svg.selectAll(".link")
      .data(json.links)
      .enter().append("line")
      .attr("class", "link");

var node = svg.selectAll(".node")
      .data(json.nodes)
      .enter().append("g")
      .attr("class", "node")
      .call(force.drag);

node.append("image")
    .attr("xlink:href", function(d) { return "https://www.nox4think.com.br/imgs/" + d.ind + ".png";})
    .attr("x", -40)
    .attr("y", -40)
    .attr("width", 80)
    .attr("height", 80);

node.append("text")
      .attr("text-anchor", "middle")
      .attr("dx", 0)
      .attr("dy", 55)
      .text(function(d) { return d.name });

force.on("tick", function() {
    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.attr("transform", function(d) { return "translate(" + d.x + "," + d.y + ")"; });
  });
});

</script>

Modified http://d3js.org/d3.v3.min.js to a secure url

https://d3js.org/d3.v3.min.js