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cartogram.html
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<!DOCTYPE html>
<html lang="en">
<head>
<script async src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js"></script>
<script>
(adsbygoogle = window.adsbygoogle || []).push({
google_ad_client: "ca-pub-3523953066677938",
enable_page_level_ads: true
});
</script>
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<script async src="https://www.googletagmanager.com/gtag/js?id=UA-79254642-6"></script>
<script>
window.dataLayer = window.dataLayer || [];
function gtag(){dataLayer.push(arguments);}
gtag('js', new Date());
gtag('config', 'UA-79254642-6');
</script>
<meta charset="utf-8">
<title>Cartogram | the D3 Graph Gallery</title>
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<meta name="description" content="How to build a cartogram with Javascript and D3.js: from the most basic example to highly customized examples.">
<meta name="keywords" content="Data,Dataviz,Datavisualization,Javascript,D3,D3.js,area chart">
<meta name="author" content="Yan Holtz">
<link rel="icon" href="img/logo/D3_single_small.png">
<meta property="og:title" content="Area Chart | the D3 Graph Gallery">
<meta property="og:image" content="img/overview_RGG.png">
<meta property="og:description" content="How to build a cartogram with Javascript and D3.js: from the most basic example to highly customized examples.">
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<!-- Header -->
<header class="masthead" style="padding-top: 150px; padding-bottom: 80px">
<div class="textlanding">
<h1>Cartogram</h1>
<hr class="short_hr">
<br>
<ul class="list-inline social-buttons">
<li class="list-inline-item">
<a href="https://twitter.com/R_Graph_Gallery">
<i class="fa fa-twitter"></i>
</a>
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</a>
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<a href="https://www.yan-holtz.com">
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</ul>
<br><br>
<p style="max-width: 700px; margin: auto">A <a href="https://www.data-to-viz.com/graph/cartogram.html">cartogram</a> is a map in which the geometry of regions is distorted in order to convey the information of an alternate variable. The region area will be inflated or deflated according to its numeric value. Read more about it <a href="https://www.data-to-viz.com/graph/cartogram.html">here</a>, or check the d3.js examples below.</p>
</div>
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<section class="bg" id="portfolio" style="padding-top: 10px">
<div class="container">
<div class="mySeryTitle">Step by step</div>
<hr>
<p>The most popular way to build a cartogram with d3 is the <a href="https://github.com/shawnbot/topogram">topogram library</a> built by Shawn Allen. It relies on a algorithm to construct continuous area cartograms by <a href="http://lambert.nico.free.fr/tp/biblio/Dougeniketal1985.pdf">A. Dougenik et al</a>. The following examples should guide you through its basic usage.</p>
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<p>A few blocks with more complicated codes to showcase what's possible to do with connection maps. First show how to display connections on hover. Second show how to apply <a href="bundle.html">edge bundling</a> to the connection to declutter the chart.</p>
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<a class="portfolio-link" href="http://prag.ma/code/d3-cartogram/#popest/2011">
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<div class="portfolio-hover-content">
<p>US cartogram</p>
<hr>
<p class="explanation_portfolio">Cartograms of the US with button to control the input variable.</p>
</div>
</div>
<img class="img-fluid showBlock" src="img/block/block_cartogramUS.png" alt="US cartogram">
</a>
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<div class="portfolio-hover-content">
<p>Cartogram with button</p>
<hr>
<p class="explanation_portfolio">Cartogram of Switzerland with buttons to control several attributes</p>
</div>
</div>
<img class="img-fluid showBlock" src="img/block/block_cartogramSwiss.png" alt="Swiss cartogram">
</a>
</div>
</div>
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<i class="fa fa-plus fa-3x"></i>
</div>
</div>
<img class="img-fluid" src="img/section/Map150.png" alt="">
</a>
<div class="captionPortfolio">Map</div>
</div>
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<a class="portfolio-link" href="choropleth.html">
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<i class="fa fa-plus fa-3x"></i>
</div>
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<div class="captionPortfolio">Choropleth</div>
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<div class="captionPortfolio">Hexbin map</div>
</div>
<div class="col-md-2 col-sm-4 portfolio-item">
<a class="portfolio-link" href="cartogram.html">
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<div class="portfolio-hover-content">
<i class="fa fa-plus fa-3x"></i>
</div>
</div>
<img class="img-fluid" src="img/section/Cartogram150.png" alt="">
</a>
<div class="captionPortfolio">Cartogram</div>
</div>
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<a class="portfolio-link" href="connectionmap.html">
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<div class="captionPortfolio">Bubble map</div>
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