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@bperel
Last active August 29, 2015 13:58
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Superimposed maps
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<!DOCTYPE html>
<!--[if lt IE 7]> <html class="no-js lt-ie9 lt-ie8 lt-ie7"> <![endif]-->
<!--[if IE 7]> <html class="no-js lt-ie9 lt-ie8"> <![endif]-->
<!--[if IE 8]> <html class="no-js lt-ie9"> <![endif]-->
<!--[if gt IE 8]><!--> <html class="no-js"> <!--<![endif]-->
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<title></title>
<meta name="description" content="">
<meta name="viewport" content="width=device-width">
<link rel="stylesheet" href="map.css">
<script src="http://d3js.org/d3.v3.min.js" charset="utf-8"></script>
</head>
<body>
<script src="map.js"></script>
</body>
</html>
#map, #externalSvg {
position: absolute;
left: 200px;
}
.subunit-label {
fill: #777;
fill-opacity: .5;
font-size: 14px;
font-weight: 300;
text-anchor: middle;
}
.subunit-boundary {
fill: none;
stroke: #777;
stroke-dasharray: 2,2;
stroke-linejoin: round;
}
var width = 960;
var mapHeight = 440;
var projection = d3.geo.equirectangular()
.scale((width + 1) / 2 / Math.PI)
.precision(.01);
var drag = d3.behavior.drag()
.origin(function(d) { return d; })
.on("dragstart", dragstarted)
.on("drag", dragmove);
var zoom = d3.behavior.zoom()
.scaleExtent([0.01, 10])
.on("zoom", zoomed);
var svg = d3.select("body").append("svg")
.attr("width", width)
.attr("height", mapHeight)
.attr("id", "map");
showMap("background", "ne_110m_coastline.json");
d3.xml("German_Empire_1914.svg", "image/svg+xml", function(xml) {
svgMap = d3.select(
svg
.append("g")
.call(drag)
.call(zoom)
.node()
.appendChild(document.importNode(xml.documentElement, true)))
.attr("name", "German_Empire_1914")
.attr("id", "externalSvg")
.classed("externalSvg", true)
.datum({key: 1});
});
function showMap(id, filePath) {
d3.json(filePath, function(error, world) {
var path = d3.geo.path()
.projection(projection);
svg.append("g")
.attr("id", id)
.selectAll(".subunit")
.data(world.features)
.enter().append("path")
.attr("class", function(d) {
return "subunit-boundary subunit " + d.properties.adm0_a3;
})
.attr("d", path);
});
}
function dragstarted(d) {
d3.event.sourceEvent.stopPropagation();
}
function dragmove(d) {
d.x = d3.event.x;
d.y = d3.event.y;
var x=d.x || 0;
var y=d.y || 0;
d3.select(this)
.attr("transform", "translate("+x+" "+y+")");
}
function zoomed() {
d3.select(this).attr("transform", "translate(" + d3.event.translate + ")scale(" + d3.event.scale + ")");
}
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