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
-
-
Save enjalot/b3dcf273c3c6d56411b6 to your computer and use it in GitHub Desktop.
the spins
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| <!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> |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment