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cartogram.html
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<!DOCTYPE html>
<html lang="en">
<head>
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<meta charset="utf-8" />
<title>Cartogram | the D3 Graph Gallery</title>
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<meta
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content="How to build a cartogram with Javascript and D3.js: from the most basic example to highly customized examples."
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content="Data,Dataviz,Datavisualization,Javascript,D3,D3.js,area chart"
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<meta name="author" content="Yan Holtz" />
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<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 href="https://www.yan-holtz.com">
<i class="fa fa-home"></i>
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<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>
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<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.
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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.
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>
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<p>US cartogram</p>
<hr />
<p class="explanation_portfolio">
Cartograms of the US with button to control the input
variable.
</p>
</div>
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<img
class="img-fluid showBlock"
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<p>Cartogram with button</p>
<hr />
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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"
/>
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