user389: This seems pretty cool
https://stats.meta.stackexchange.com/questions/1467/tag-map-for-crossvalidated
Our brothers at Chem.SE have something of the sort
https://chemistry.meta.stackexchange.com/q/192/57

user25568: Here is manually-done one. Each color indicate a highly related field of study. 


user16866: For fun, here's the updated January 5, 2017 Update:

I tried to arrange the dots in a way that mirrored Piotr's 2015 update.
Unsurprisingly, there is minimal change. 

user129: So, here it is for Biology.SE: 

Some more description e.g. on a respective post on meta.math.SE. In particular, colours stand for graph communities (groups of nodes which have a lot of connections between each other).
The project is on GitHub: https://github.com/stared/tag-graph-map-of-stackexchange/wiki (feel invited to tweak the plot to your taste).
I hope you like it! :)
EDIT
A newer, interactive and always up-to-date version is here: TagOverflow.
Code and a more detailed description is on GitHub.


389: <p>This seems pretty cool</p>

<p><a href="https://stats.meta.stackexchange.com/questions/1467/tag-map-for-crossvalidated">https://stats.meta.stackexchange.com/questions/1467/tag-map-for-crossvalidated</a></p>

<p>Our brothers at Chem.SE have something of the sort
<a href="https://chemistry.meta.stackexchange.com/q/192/57">https://chemistry.meta.stackexchange.com/q/192/57</a></p>
 25568: <p>Here is manually-done one. Each color indicate a highly related field of study. </p>

<p><a href="https://i.stack.imgur.com/gNehg.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/gNehg.png" alt="Map"></a></p>
 16866: <p>For fun, here's the updated January 5, 2017 Update:</p>

<p><a href="https://i.stack.imgur.com/zoqLG.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/zoqLG.png" alt="Tag Map-Biology-SE - 2017"></a></p>

<p>I tried to arrange the dots in a way that mirrored Piotr's <a href="https://biology.meta.stackexchange.com/a/371/16866">2015 update</a>.</p>

<p>Unsurprisingly, there is minimal change. </p>
 129: <p>So, here it is for Biology.SE: </p>

<p><img src="https://i.stack.imgur.com/eZOwN.png" alt="enter image description here"></p>

<p>Some more description e.g. on <a href="https://math.meta.stackexchange.com/questions/6479/a-graph-map-of-math-se">a respective post on meta.math.SE</a>. In particular, colours stand for graph communities (groups of nodes which have a lot of connections between each other).</p>

<p>The project is on GitHub: <a href="https://github.com/stared/tag-graph-map-of-stackexchange/wiki" rel="nofollow noreferrer">https://github.com/stared/tag-graph-map-of-stackexchange/wiki</a> (feel invited to tweak the plot to your taste).</p>

<p>I hope you like it! :)</p>

<h1>EDIT</h1>

<p>A newer, interactive and always up-to-date version is here: <a href="http://stared.github.io/tagoverflow/?site=biology&amp;size=32" rel="nofollow noreferrer"><strong>TagOverflow</strong></a>.</p>

<p><a href="https://github.com/stared/tagoverflow#tagoverflow" rel="nofollow noreferrer">Code and a more detailed description is on GitHub</a>.</p>

<p><img src="https://i.stack.imgur.com/IOXJ4.png" alt="enter image description here"></p>
