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August 29, 2015 13:56
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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