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Last active May 19, 2023 09:17
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World Tour
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.block
license: gpl-3.0
redirect: https://observablehq.com/@mbostock/world-tour
Raw
index.html
<!DOCTYPE html>
<meta charset="utf-8">
<style>
h1 {
position: absolute;
top: 500px;
font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
font-size: 18px;
text-align: center;
width: 960px;
}
</style>
<h1></h1>
<script src="//d3js.org/d3.v3.min.js"></script>
<script src="//d3js.org/queue.v1.min.js"></script>
<script src="//d3js.org/topojson.v1.min.js"></script>
<script>
var width = 960,
height = 960;
var projection = d3.geo.orthographic()
.translate([width / 2, height / 2])
.scale(width / 2 - 20)
.clipAngle(90)
.precision(0.6);
var canvas = d3.select("body").append("canvas")
.attr("width", width)
.attr("height", height);
var c = canvas.node().getContext("2d");
var path = d3.geo.path()
.projection(projection)
.context(c);
var title = d3.select("h1");
queue()
.defer(d3.json, "/mbostock/raw/4090846/world-110m.json")
.defer(d3.tsv, "/mbostock/raw/4090846/world-country-names.tsv")
.await(ready);
function ready(error, world, names) {
if (error) throw error;
var globe = {type: "Sphere"},
land = topojson.feature(world, world.objects.land),
countries = topojson.feature(world, world.objects.countries).features,
borders = topojson.mesh(world, world.objects.countries, function(a, b) { return a !== b; }),
i = -1,
n = countries.length;
countries = countries.filter(function(d) {
return names.some(function(n) {
if (d.id == n.id) return d.name = n.name;
});
}).sort(function(a, b) {
return a.name.localeCompare(b.name);
});
(function transition() {
d3.transition()
.duration(1250)
.each("start", function() {
title.text(countries[i = (i + 1) % n].name);
})
.tween("rotate", function() {
var p = d3.geo.centroid(countries[i]),
r = d3.interpolate(projection.rotate(), [-p[0], -p[1]]);
return function(t) {
projection.rotate(r(t));
c.clearRect(0, 0, width, height);
c.fillStyle = "#ccc", c.beginPath(), path(land), c.fill();
c.fillStyle = "#f00", c.beginPath(), path(countries[i]), c.fill();
c.strokeStyle = "#fff", c.lineWidth = .5, c.beginPath(), path(borders), c.stroke();
c.strokeStyle = "#000", c.lineWidth = 2, c.beginPath(), path(globe), c.stroke();
};
})
.transition()
.each("end", transition);
})();
}
d3.select(self.frameElement).style("height", height + "px");
</script>
@espinielli
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I think there is a bug. to see it you let the animation run long enough and get over all the first 174 countries.
So after Zimbawe you get

      Uncaught TypeError: Cannot read property 'name' of undefined

In fact, this is due to the fact that =n=, the number of countries to iterate through is initialized before the array is filtered. =n= should be set after the filter like:

  // ...

  countries = countries.filter(function(d) {
    return names.some(function(n) {
      if (d.id == n.id) return d.name = n.name;
    });
  }).sort(function(a, b) {
    return a.name.localeCompare(b.name);
  });
  n = countries.length;
  // ...

In my own fork I made the tour random as well:

  // ...
  (function transition() {
    d3.transition()
        .duration(1250)
        .each("start", function() { // listen for the transition's start event
            title.text(countries[i = Math.floor(n * Math.random())].name);
        })
   //...

HTH

@sherryyur
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Map doesn't load in IE9/10 .

SCRIPT438: Object doesn't support property or method 'transition'
d3.v3.min.js, line 4 character 29727

@awc-fueled
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Where can I find the tsv and json files?

@martinbarnard
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Go poking in https://gist.github.com/mbostock/4090846 and you'll find the data :)

@talyellin
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Getting this error when trying to locate Singapore:
(index):75 Uncaught TypeError: Cannot read property 'name' of undefined(…)

Is it not in world-110m.json?

@Zerg00s
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Zerg00s commented Feb 4, 2017

I've slightly tweaked this project to add search: https://run.plnkr.co/6uQO5uJyDW2INqDS/

@havajsky
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There is another small mistake:
land = topojson.feature(world, world.objects.land)
should be:
land = topojson.feature(world, world.objects.land).features
This does not show up because all countries compose land, but when you filter countries, e.g. to highlight only the countries of the Pacific Rim, it becomes a problem that's hard to find...

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