Admiring Jason Davies' work on the Weichel projection
forked from enjalot's block: visualizing map distortion
forked from enjalot's block: d3.geo.weichel
Last active
May 30, 2016 18:36
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the spins
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| <!DOCTYPE html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script> | |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/d3-geo-projection/0.2.15/d3.geo.projection.min.js"></script> | |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/topojson/1.6.19/topojson.min.js"></script> | |
| <style> | |
| body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; } | |
| svg { width: 100%; height: 100%; } | |
| path.foreground { | |
| fill: none; | |
| stroke: #9e9e9e; | |
| stroke-width: 1.5px; | |
| } | |
| path.graticule { | |
| fill: none; | |
| stroke: #494949; | |
| stroke-width: .5px; | |
| } | |
| #map .land { | |
| fill: #d7c7ad; | |
| stroke: #5a4f3e; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <script> | |
| var width = document.body.clientWidth; | |
| var height = document.body.clientHeight; | |
| var scale = 350 * height/600; | |
| var canvas = d3.select("body").append("canvas") | |
| .attr({ | |
| width: width, | |
| height: height | |
| }) | |
| var context = canvas.node().getContext("2d"); | |
| var projection = d3.geo.wiechel() | |
| .scale(scale) | |
| .translate([width/2, height/2]) | |
| .rotate([0, -90]) | |
| .clipAngle(180 - 1) | |
| .precision(.1) | |
| .rotate([100, -90]) | |
| var path = d3.geo.path() | |
| .projection(projection) | |
| .context(context) | |
| var start = Date.now(); | |
| var duration = 20; | |
| var pause = false; | |
| var dir = 1; | |
| d3.timer(function(elapsed) { | |
| var now = Date.now(); | |
| if(now - start > duration) { | |
| start = now; | |
| } else { | |
| return false; | |
| } | |
| var deg = 1; | |
| var rot = projection.rotate() | |
| rot[0] = (rot[0] + deg)// % 360 | |
| rot[1] = (rot[1] + deg)// % 360 | |
| projection.rotate(rot) | |
| update() | |
| return pause; | |
| }) | |
| d3.select("body").on("click", function() { | |
| pause = true; | |
| }) | |
| var graticule = d3.geo.graticule()(); | |
| var land, boundary; | |
| d3.json("world-110m.json", function(error,world) { | |
| if (error) throw error; | |
| land = topojson.feature(world, world.objects.land); | |
| boundary = boundary = topojson.mesh(world, world.objects.countries, function(a, b) { return a !== b; }); | |
| update(); | |
| }); | |
| var grats = false; | |
| d3.select("body").on("click", function() { | |
| grats = !grats; | |
| }); | |
| context.globalAlpha = 1; | |
| function update() { | |
| context.clearRect(0, 0, width, height); | |
| if(grats) { | |
| context.beginPath(); | |
| path(graticule); | |
| //context.globalAlpha = .5; | |
| context.strokeStyle = "#222"; | |
| context.stroke(); | |
| } else { | |
| context.beginPath(); | |
| path(land); | |
| context.fillStyle = "#222"; | |
| context.fill(); | |
| } | |
| } | |
| </script> | |
| </body> | |
| <script> | |
| (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){ | |
| (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o), | |
| m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m) | |
| })(window,document,'script','//www.google-analytics.com/analytics.js','ga'); | |
| ga('create', 'UA-67666917-1', 'auto'); | |
| ga('send', 'pageview'); | |
| </script> |
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