This is a rendering of the world using d3.geo.orthographic. The countries are clickable, and the projection rotates to center on each country that is clicked. This is based off of examples by Mike Bostock, including the World Tour.
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December 8, 2020 15:00
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D3 orthographic map with center on click
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| license: gpl-3.0 |
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <style> | |
| body { | |
| background: #fcfcfa; | |
| } | |
| .stroke { | |
| fill: none; | |
| stroke: #000; | |
| stroke-width: 1px; | |
| } | |
| .fill { | |
| fill: #f2f2f2; | |
| } | |
| .graticule { | |
| fill: none; | |
| stroke: #777; | |
| stroke-width: .5px; | |
| stroke-opacity: .5; | |
| } | |
| .land { | |
| fill: darkgrey; | |
| } | |
| .boundary { | |
| fill: none; | |
| stroke: #fff; | |
| stroke-width: .5px; | |
| } | |
| </style> | |
| <body> | |
| <script src="//d3js.org/d3.v3.min.js"></script> | |
| <script src="//d3js.org/topojson.v1.min.js"></script> | |
| <script src="//d3js.org/queue.v1.min.js"></script> | |
| <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.2.0/jquery.min.js"></script> | |
| <script> | |
| var width = 950, | |
| height = 700; | |
| var colors = { clickable: 'darkgrey', hover: 'grey', clicked: "red", clickhover: "darkred" }; | |
| var projection = d3.geo.orthographic() | |
| .scale(300) | |
| .translate([width / 2, height / 2]) | |
| .clipAngle(90) | |
| .precision(10); | |
| var path = d3.geo.path() | |
| .projection(projection); | |
| var graticule = d3.geo.graticule(); | |
| var map = d3.select("body").append("svg") | |
| .attr("width", width) | |
| .attr("height", height) | |
| .attr("class", "map"); | |
| map.append("defs").append("path") | |
| .datum({type: "Sphere"}) | |
| .attr("id", "sphere") | |
| .attr("d", path); | |
| map.append("use") | |
| .attr("class", "stroke") | |
| .attr("xlink:href", "#sphere"); | |
| map.append("use") | |
| .attr("class", "fill") | |
| .attr("xlink:href", "#sphere"); | |
| map.append("path") | |
| .datum(graticule) | |
| .attr("class", "graticule") | |
| .attr("d", path); | |
| 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; }); | |
| 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); | |
| }); | |
| map.insert("path", ".graticule") | |
| .datum(topojson.feature(world, world.objects.land)) | |
| .attr("class", "land") | |
| .attr("d", path); | |
| for(i = 0; i < names.length; i++) { | |
| for (j = 0; j < countries.length; j++) { | |
| if (countries[j].id == names[i].id) { | |
| map.insert("path", ".graticule") | |
| .datum(countries[j]) | |
| .attr("fill", colors.clickable) | |
| .attr("d", path) | |
| .attr("class", "clickable") | |
| .attr("data-country-id", j) | |
| .on("click", function() { | |
| d3.selectAll(".clicked") | |
| .classed("clicked", false) | |
| .attr("fill", colors.clickable); | |
| d3.select(this) | |
| .classed("clicked", true) | |
| .attr("fill", colors.clicked); | |
| (function transition() { | |
| d3.select(".clicked").transition() | |
| .duration(1250) | |
| .tween("rotate", function() { | |
| var p = d3.geo.centroid(countries[d3.select(this).attr("data-country-id")]), | |
| r = d3.interpolate(projection.rotate(), [-p[0], -p[1]]); | |
| return function (t) { | |
| projection.rotate(r(t)); | |
| map.selectAll("path").attr("d", path); | |
| } | |
| }); | |
| })(); | |
| }) | |
| .on("mousemove", function() { | |
| var c = d3.select(this); | |
| if (c.classed("clicked")) { | |
| c.attr("fill", colors.clickhover); | |
| } else { | |
| c.attr("fill", colors.hover); | |
| } | |
| }) | |
| .on("mouseout", function() { | |
| var c = d3.select(this); | |
| if (c.classed("clicked")) { | |
| c.attr("fill", colors.clicked); | |
| } else { | |
| d3.select(this).attr("fill", colors.clickable); | |
| } | |
| }); | |
| } | |
| } | |
| } | |
| map.insert("path", ".graticule") | |
| .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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Hi, I am creating a project that collects data from countries worldwide, from the CIA factbook and from NomadList's API. I was wondering if you mind shedding some insight on how to add functionality for clicking countries and getting a smooth transition between clicks to navigate the globe? Is there any npm package or additional insight needed beyond this code? I have tried a few times to replicate what you have done and have not had success with the interactivity. I am essentially able to render the what is in your thumbnail here.