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World map - orthographic
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <style> | |
| .water { | |
| fill: #ddd; | |
| } | |
| .graticule { | |
| fill: none; | |
| stroke: #444; | |
| stroke-width: 0.6; | |
| stroke-opacity: 0.4; | |
| } | |
| .land { | |
| fill: #444; | |
| fill-opacity: 0.6; | |
| stroke: #444; | |
| stroke-opacity: 0.7; | |
| stroke-width: 1.5; | |
| } | |
| .countries path { | |
| fill: #c6b27b; | |
| fill-opacity: 0.4; | |
| stroke: #444; | |
| stroke-linejoin: round; | |
| stroke-width: 0.4; | |
| stroke-opacity: 0.2; | |
| } | |
| .countries path:hover { | |
| fill-opacity: 0.6; | |
| stroke-width: 1.1; | |
| stroke-opacity: 0.5; | |
| } | |
| .labels { | |
| font: 12px sans-serif; | |
| fill: #444; | |
| } | |
| .point{ | |
| fill: #700000; | |
| opacity: 0.8; | |
| } | |
| .noclick { | |
| pointer-events:none; | |
| } | |
| </style> | |
| <body> | |
| <script src="http://d3js.org/d3.v3.min.js"></script> | |
| <script src="http://d3js.org/queue.v1.min.js"></script> | |
| <script src="http://d3js.org/topojson.v0.min.js"></script> | |
| <script> | |
| var width = 960, | |
| height = 500; | |
| var projection = d3.geo.orthographic() | |
| .scale(245) | |
| .translate([width/2, height/2]) | |
| .precision(0.1) | |
| .rotate([52.8, -49.6]) | |
| .clipAngle(90); | |
| // scales for fading/sizing labels/points | |
| var opacityScale = d3.scale.linear() | |
| .domain([200, 150]) | |
| .range([1,0]); | |
| var ptSizeScale = d3.scale.linear() | |
| .domain([500, 150]) | |
| .range([12,7]); | |
| var path = d3.geo.path().projection(projection).pointRadius(2); | |
| var graticule = d3.geo.graticule(); | |
| d3.select(window) | |
| .on("mousemove", mouseMove) | |
| .on("mouseup", mouseUp); | |
| var svg = d3.select("body") | |
| .append("svg") | |
| .attr("width", width) | |
| .attr("height", height) | |
| .on("mousedown", mouseDown) | |
| .call(d3.behavior.zoom() | |
| .translate(projection.translate()) | |
| .scale(projection.scale()) | |
| .scaleExtent([50,500]) | |
| .on("zoom", function() { | |
| reZoom(); | |
| }) | |
| ); | |
| // queue for loading topojson and places data | |
| queue() | |
| .defer(d3.json, "world-110m.json") | |
| .defer(d3.json, "world-places.json") | |
| .await(ready); | |
| function ready(error, world, places) { | |
| // shading def | |
| var globe_shading = svg.append("defs") | |
| .append("radialGradient") | |
| .attr("id", "globe_shading") | |
| .attr("cx", "50%") | |
| .attr("cy", "40%"); | |
| globe_shading.append("stop") | |
| .attr("offset","50%") | |
| .attr("stop-color", "#fff") | |
| .attr("stop-opacity","0.2"); | |
| globe_shading.append("stop") | |
| .attr("offset","100%") | |
| .attr("stop-color", "#253d56") | |
| .attr("stop-opacity","0.4"); | |
| // water sphere | |
| svg.append("path") | |
| .datum({type: "Sphere"}) | |
| .attr("class", "water noclick") | |
| .attr("d", path); | |
| // graticule | |
| svg.append("path") | |
| .datum(graticule) | |
| .attr("class", "graticule noclick") | |
| .attr("d", path); | |
| // land shape | |
| svg.append("path") | |
| .datum(topojson.object(world, world.objects.land)) | |
| .attr("class", "land noclick") | |
| .attr("d", path); | |
| // shading sphere | |
| svg.append("path") | |
| .datum({type: "Sphere"}) | |
| .attr("class","noclick") | |
| .style("fill", "url(#globe_shading)"); | |
| // country shapes | |
| svg.append("g").attr("class", "countries") | |
| .selectAll("path") | |
| .data(topojson.object(world, world.objects.countries).geometries) | |
| .enter().append("path") | |
| .attr("class", "countries") | |
| .attr("d", path) | |
| .on("mouseover", function(d) { | |
| console.log("country id: " + d.id); | |
| }); | |
| // place points | |
| svg.append("g").attr("class","points noclick") | |
| .selectAll("text") | |
| .data(places.features) | |
| .enter().append("path") | |
| .attr("class", "point") | |
| .attr("d", path); | |
| // place labels | |
| svg.append("g").attr("class","labels noclick") | |
| .selectAll("text") | |
| .data(places.features) | |
| .enter().append("text") | |
| .attr("class", "label") | |
| .text(function(d) { | |
| return d.properties.name; | |
| }); | |
| reDraw(); | |
| } | |
| function positionLabels() { | |
| var centerPos = projection.invert([width/2,height/2]); | |
| var arc = d3.geo.greatArc(); | |
| var s = projection.scale(); | |
| // labels | |
| svg.selectAll(".label") | |
| .attr("text-anchor",function(d) { | |
| var x = projection(d.geometry.coordinates)[0]; | |
| if (x < (width/2) - 20) { | |
| return "end"; | |
| } else if (x < (width/2) + 20) { | |
| return "middle"; | |
| } else { | |
| return "start"; | |
| } | |
| }) | |
| .attr("transform", function(d) { | |
| var loc = projection(d.geometry.coordinates), | |
| x = loc[0], | |
| y = loc[1], | |
| xoffset = 6, | |
| yoffset = -3; | |
| if (x < width/2) { | |
| xoffset = -6; | |
| } | |
| if (x < (width/2) - 20) { | |
| yoffset = -1; | |
| } else if (x < (width/2) + 20) { | |
| yoffset = -6; | |
| } else { | |
| yoffset = -1; | |
| } | |
| return "translate(" + (x + xoffset) + "," + (y + yoffset) + ")"; | |
| }) | |
| .style("opacity", function() { | |
| return opacityScale(s); | |
| }) | |
| .style("font-size", function() { | |
| return ptSizeScale(s); | |
| }) | |
| .style("display",function(d) { | |
| var dist = arc.distance({source: d.geometry.coordinates, target: centerPos}); | |
| if (dist > 1.57) { | |
| return 'none'; | |
| } else { | |
| return 'inline'; | |
| } | |
| }); | |
| // points | |
| svg.selectAll(".point") | |
| .style("opacity", function() { | |
| return opacityScale(s); | |
| }); | |
| } | |
| function reDraw() { | |
| svg.selectAll("path").attr("d", path); | |
| positionLabels(); | |
| // console.log("Map center: ", -projection.rotate()[1], -projection.rotate()[0]); | |
| } | |
| function reZoom() { | |
| if (d3.event) { projection.scale(d3.event.scale); } | |
| svg.selectAll("*").attr("d", path); | |
| positionLabels(); | |
| // console.log("Map scale: ", d3.event.scale); | |
| } | |
| // window mousemove | |
| function mouseMove() { | |
| if (m0) { | |
| // limit vertical rotation between 55 & -55 | |
| var m1 = [d3.event.pageX, d3.event.pageY], | |
| o1 = [o0[0] + (m1[0] - m0[0]) / 6, o0[1] + (m0[1] - m1[1]) / 6]; | |
| if (o1[1] > 55) { | |
| o1[1] = 55; | |
| } | |
| if (o1[1] < -55) { | |
| o1[1] = -55; | |
| } | |
| projection.rotate(o1); | |
| reDraw(); | |
| } | |
| } | |
| // window mouseup | |
| function mouseUp() { | |
| if (m0) { | |
| mouseMove(); | |
| m0 = null; | |
| } | |
| } | |
| // svg mousedown | |
| var m0, o0; | |
| function mouseDown() { | |
| m0 = [d3.event.pageX, d3.event.pageY]; | |
| o0 = projection.rotate(); | |
| d3.event.preventDefault(); | |
| } | |
| </script> | |
| </body> |
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