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Testing map labels with background
license: mit
height: 600
border: none
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Testing map labels</title>
<script src="http://d3js.org/d3.v3.min.js"></script>
<script src="http://d3js.org/d3.geo.projection.v0.min.js"></script>
<script src="http://d3js.org/topojson.v1.min.js"></script>
<style>
body {
font-family: 'Source Sans Pro', Arial, Helvetica, sans-serif;
font-size: 62.5%;
}
path {
stroke-linejoin: round;
}
.land-glow {
fill-opacity: .2;
filter: url(#blur);
fill: #1e1e1e;
}
.land-fill {
fill-opacity: 0;
stroke: rgb(70, 70, 70);
stroke-width: .35px;
}
.region {
stroke: rgb(70, 70, 70);
stroke-width: 0.01rem;
}
.label-bg {
pointer-events: none;
text-anchor: middle;
fill: none;
stroke: white;
font-size: 0.9rem;
stroke-width: 0.2rem;
opacity: 0.9;
}
.label {
z-index: 10;
pointer-events: none;
text-anchor: middle;
font-size: 0.9rem;
text-shadow: 0 0 3px #fff;
fill: rgb(70, 70, 70);
}
</style>
</head>
<body>
<script type="text/javascript">
var width = 960,
height = 600;
var path = d3.geo.path()
.projection(d3.geo.robinson()
.scale(2700)
.center([3.582022, 40.9582426])
.translate([width / 7, height / 1.8]));
var svg = d3.select("body").append("svg")
.attr("width", width)
.attr("height", height)
.append('g');
var defs = svg.append("defs");
defs.append("filter")
.attr("id", "blur")
.append("feGaussianBlur")
.attr("stdDeviation", 5);
d3.json("italy.json", function(error, italy) {
var map = topojson.feature(italy, italy.objects.reg2011);
defs.append("path")
.datum(map)
.attr("id", "land")
.attr("d", path);
svg.append("use")
.attr("class", "land-glow")
.attr("xlink:href", "#land");
svg.append("use")
.attr("class", "land-fill")
.attr("xlink:href", "#land");
var color = d3.scale.quantize()
.domain(d3.extent(map.features, function(d) {
return d.properties.SHAPE_Leng;
}))
.range(["#fff7fb", "#ece7f2", "#d0d1e6", "#a6bddb", "#74a9cf"]);
var region = svg.append("g").attr("class", "polygons");
region.selectAll(".region").data(map.features)
.enter().insert("path")
.attr("class", "region")
.attr("d", path)
.style("fill", function(d, i) {
return color(d.properties.SHAPE_Leng);
});
var labelsBg = svg.append("g").attr("class", "label-group-bg");
labelsBg.selectAll(".label-bg")
.data(map.features)
.enter()
.append("text")
.attr("class", "label-bg")
.attr("x", function(d) {
return path.centroid(d)[0];
})
.attr("y", function(d) {
return path.centroid(d)[1];
})
.text(function(d) {
return d.properties.NOME_REG;
});
var labels = svg.append("g").attr("class", "label-group");
labels.selectAll(".label")
.data(map.features)
.enter()
.append("text")
.attr("class", "label")
.attr("x", function(d) {
return path.centroid(d)[0];
})
.attr("y", function(d) {
return path.centroid(d)[1];
})
.text(function(d) {
return d.properties.NOME_REG;
});
})
</script>
</body>
</html>
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