MINI

files >> C:/SiakApp/web/map/svg_label.js
 function addText(p)
{
    var t = document.createElementNS("http://www.w3.org/2000/svg", "text");
    var b = p.getBBox();
    t.setAttribute("transform", "translate(" + (b.x + b.width/2) + " " + (b.y + b.height/2) + ")");
    t.textContent = "a";
    t.setAttribute("fill", "red");
    t.setAttribute("font-size", "1");
    p.parentNode.insertBefore(t, p.nextSibling);
}

var paths = document.querySelectorAll("path");
for (var p in paths)
{
    addText(paths[p])
}