                <h4 class="modal-title"></h4>
            </div>
            <div class="modal-body">
            </div>
            <div class="modal-footer">
                <button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
            </div>
        </div>
    </div>
</div>
<center>
<svg id="chart3" width="1800" height="1800"></svg>
</center>


<script>

var tooltip = d3.select("body")
    .append("div")
    .attr("class", "hint-content")

var modal = d3.select("body")
   