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Learning D3.js 5 Mapping

You're reading from   Learning D3.js 5 Mapping Build cutting-edge maps and visualizations with JavaScript

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Product type Paperback
Published in Nov 2017
Publisher
ISBN-13 9781787280175
Length 298 pages
Edition 2nd Edition
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Authors (3):
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Thomas Newton Thomas Newton
Author Profile Icon Thomas Newton
Thomas Newton
Oscar Villarreal Oscar Villarreal
Author Profile Icon Oscar Villarreal
Oscar Villarreal
Lars Verspohl Lars Verspohl
Author Profile Icon Lars Verspohl
Lars Verspohl
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Toc

Table of Contents (13) Chapters Close

Preface 1. Gathering Your Cartography Toolbox FREE CHAPTER 2. Creating Images from Simple Text 3. Producing Graphics from Data - the Foundations of D3 4. Creating a Map 5. Click-Click Boom! Applying Interactivity to Your Map 6. Finding and Working with Geographic Data 7. Testing 8. Drawing with Canvas and D3 9. Mapping with Canvas and D3 10. Adding Interactivity to Your Canvas Map 11. Shaping Maps with Data - Hexbin Maps 12. Publishing Your Visualization with GitHub Pages

Making a hexbin map

Having improved our US state choropleth map with hexagons, let’s now use hexagons to alter our dot density map. There are benefits to a dot density map as we have seen previously, so the changes we are about to make are more alterations than clear improvements. Here’s what we will build:

A map of many hexagons in color

It’s a hexbin map showing the farmers' markets hotspots. Areas with no farmers' markets are shown as white hexagons, areas with many farmers' markets are shown in blue to dark purple. Lighter and less saturated yellow and green hexagons represent areas with fewer markets.

Reviewing the hexbin algorithm

What do we want to achieve? There are two major steps...

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