italy = d3.json(map_url, function(error, it) {
var projection = d3.geo.albers()
.center([0, 41])
.rotate([347, 0])
.parallels([35, 45])
.scale(2000)
.translate([width / 2, height / 2]);
var subunits = topojson.feature(it, it.objects.sub);
var path = d3.geo.path()
.projection(projection);
svg.append("path")
.datum(topojson.mesh(it, it.objects.sub, function(a, b) { return a === b ; }))
.attr("class", "border_map")
.attr("d", path);
svg.append("path")
.datum(subunits)
.attr("class", "map")
.attr("d", path);
svg.append("path")
.datum(topojson.mesh(it, it.objects.sub, function(a, b) { return b.id === 'TORINO' || a.id === 'TORINO'; }))
.attr("class", "torino_map")
.attr("d", path);
});