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@toja
Last active September 19, 2017 17:16
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World - SVG filter
license: gpl-3.0
height: 500
border: no
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<!DOCTYPE html>
<meta charset="utf-8">
<style>
.stroke {
fill: none;
stroke: #ccc;
stroke-width: .5px;
}
.fill {
fill: #f2f4f6;
}
.graticule {
fill: none;
stroke: #ccc;
stroke-width: .5px;
stroke-opacity: .4;
}
.land {
fill: #e4e2e0;
}
.boundary {
fill: none;
stroke: #c6c4c2;
stroke-width: 0.5px;
}
</style>
<body>
<script src="//d3js.org/d3.v4.min.js"></script>
<script src="//d3js.org/d3-geo-projection.v1.min.js"></script>
<script src="//d3js.org/topojson.v2.min.js"></script>
<script>
var width = 960,
height = 500;
var proj = d3.geoKavrayskiy7()
.precision(.1);
var path = d3.geoPath()
.projection(proj);
var graticule = d3.geoGraticule();
var svg = d3.select("body").append("svg")
.attr("width", width)
.attr("height", height);
var defs = svg.append("defs");
var oglow = defs.append("filter")
.attr("id","oglow");
oglow.append("feColorMatrix")
.attr("in","SourceGraphic")
.attr("type", "matrix")
.attr("values", "0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 4 0")
.attr("result","mask");
oglow.append("feMorphology")
.attr("in","mask")
.attr("radius","1")
.attr("operator","dilate")
.attr("result","mask");
oglow.append("feColorMatrix")
.attr("in","mask")
.attr("type", "matrix")
.attr("values", "0 0 0 0 0.4 0 0 0 0 0.45 0 0 0 0 0.5 0 0 0 1 0")
.attr("result","r0");
oglow.append("feGaussianBlur")
.attr("in","r0")
.attr("stdDeviation","3")
.attr("result","r1");
oglow.append("feComposite")
.attr("operator","out")
.attr("in","r1")
.attr("in2","mask")
.attr("result","comp");
var frMerge = oglow.append("feMerge");
frMerge.append("feMergeNode")
.attr("in","SourceGraphic");
frMerge.append("feMergeNode")
.attr("in","r1");
defs.append("path")
.datum({type: "Sphere"})
.attr("id", "sphere")
.attr("d", path);
svg.append("use")
.attr("class", "stroke")
.attr("xlink:href", "#sphere");
svg.append("use")
.attr("class", "fill")
.attr("xlink:href", "#sphere");
var features = svg.append("g");
features.append("path")
.datum(graticule)
.attr("class", "graticule")
.attr("d", path);
d3.json("110m.json", function(error, world) {
if (error) throw error;
features.append("path")
.datum(topojson.feature(world, world.objects.countries))
.attr("class", "land")
.attr("d", path)
.style("filter","url(#oglow)");
features.append("path")
.datum(topojson.feature(world, world.objects.countries))
.attr("class", "land")
.attr("d", path);
features.append("path")
.datum(topojson.mesh(world, world.objects.countries, function(a, b) { return a !== b; }))
.attr("class", "boundary")
.attr("d", path);
});
d3.select(self.frameElement).style("height", height + "px");
</script>
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