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hexbinmap.html
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<!DOCTYPE html>
<html lang="en">
<head>
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<title>Hexbin map | the D3 Graph Gallery</title>
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<meta name="description" content="How to build a hexbin map with Javascript and D3.js: a set of examples with code and explanation">
<meta name="keywords" content="Data,Dataviz,Datavisualization,Javascript,D3,D3.js,area chart">
<meta name="author" content="Yan Holtz">
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<meta property="og:title" content="Hexbin map | the D3 Graph Gallery">
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<meta property="og:description" content="How to build a hexbin map with Javascript and D3.js: a set of examples with code and explanation.">
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<h1>Hexbin map</h1>
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<br><br>
<p style="max-width: 700px; margin: auto">A <a href="https://www.data-to-viz.com/graph/hexbinmap.html">hexbin map</a> refers to two different concepts. It can be based on a geospatial object where all regions of the map are represented as hexagons. Or it can refer to a 2d density technique described in <a href="density2d.html">this section</a>. Read the dedicated article in <a href="https://www.data-to-viz.com/graph/hexbinmap.html">data-to-viz</a> to make sure you understand the difference.</p>
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<div class="mySeryTitle">Hexbin map from geospatial object</div>
<hr>
<p>In this case, the technique is very close from a <a href="choropleth.html">choropleth map</a>. It's actually exactly the same, except that the geoJson input gives hexagon boundaries instead of region boundaries. Thus, you probably want to visit the <a href="choropleth.html">choropleth section</a> for more examples.</p>
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<p>Most basic</p>
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<p class="explanation_portfolio">Just a basic background map based on a geoJson input that gives the hexagon boundary.</p>
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<p>Add label in centroids</p>
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<p class="explanation_portfolio">Use the <code>centroid()</code> function to add hexagon labels.</p>
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<div class="mySeryTitle">Hexbin map from list of coordinates</div>
<hr>
<p>In this case, the required input is a list of coordinates. The map area will be split in a multitude of hexagon, the number of data point per hexagon will be counted and represented as a color. It is actually a <a href="density2d.html">density 2d</a> technique plotted on top of a map.</p>
<a class="btn btn-secondary btn-md text-uppercase" href="density2d.html">Density 2d section</a>
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<p>Most basic</p>
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<p class="explanation_portfolio">The most basic area chart you can do in d3.js. Keeping only the core code.</p>
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<p>Bivariate Hexbin map</p>
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<p class="explanation_portfolio">Density 2d technique. Quantity of data per hexagon is represented through hexagon color and size.</p>
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<p>D3-hexbin documentation</p>
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<p class="explanation_portfolio">The complete documentation of d3-hexbin: the plugin that groups two-dimensional points into hexagonal bins.</p>
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