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@animateddata
Last active July 3, 2020 17:46
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World map with rivers
license: gpl-3.0
height: 960
border: no

World map with rivers and lakes using Natural Earth data.

Peter Cook

<!DOCTYPE html>
<meta charset="utf-8">
<head>
<title>Geo (spinning))</title>
</head>
<style>
body {
background-color: #eee;
}
</style>
<body>
<canvas id="content"></canvas>
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/4.2.2/d3.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/topojson/3.0.0/topojson.min.js"></script>
<script>
var context = document.getElementById('content').getContext('2d');
var width = window.innerWidth;
var height = window.innerHeight;
var size = d3.min([width, height]);
var landGeojson, riversGeojson, lakesGeojson;
d3.select('#content')
.attr('width', width + 'px')
.attr('height', height + 'px');
var projection = d3.geoOrthographic()
.scale(0.45 * size)
.translate([0.5 * width, 0.5 * height]);
var geoGenerator = d3.geoPath()
.projection(projection)
.context(context);
function drawFeatures(features, fill) {
context.beginPath();
geoGenerator({type: 'FeatureCollection', features: features});
fill ? context.fill() : context.stroke();
}
function update(t) {
context.clearRect(0, 0, width, height);
projection.rotate([-t / 1000 - 40])
context.lineWidth = 0.3;
context.strokeStyle = '#999';
drawFeatures(landGeojson.features, false);
context.strokeStyle = '#3882bc';
context.lineWidth = 0.5;
drawFeatures(riversGeojson.features, false);
context.fillStyle = '#3882bc';
drawFeatures(lakesGeojson.features, true);
window.requestAnimationFrame(update);
}
// REQUEST DATA
d3.json('ne.json', function(err, json) {
landGeojson = topojson.feature(json, json.objects.ne_50m_admin_0_countries)
riversGeojson = topojson.feature(json, json.objects.ne_10m_rivers_lake_centerlines)
lakesGeojson = topojson.feature(json, json.objects.ne_10m_lakes)
window.requestAnimationFrame(update);
})
</script>
</body>
</html>
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