Skip to content

Instantly share code, notes, and snippets.

@animateddata
Last active July 3, 2020 17:46
  • Star 0 You must be signed in to star a gist
  • Fork 0 You must be signed in to fork a gist
Star You must be signed in to star a gist
Save animateddata/0949801eba0d51c80f22490db665f8c3 to your computer and use it in GitHub Desktop.
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>
Display the source blob
Display the rendered blob
Raw
Sorry, something went wrong. Reload?
Sorry, we cannot display this file.
Sorry, this file is invalid so it cannot be displayed.
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment