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Expert Data Visualization

You're reading from   Expert Data Visualization Advanced information visualization with D3.js 4.x

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Product type Paperback
Published in Apr 2017
Publisher Packt
ISBN-13 9781786463494
Length 394 pages
Edition 1st Edition
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Author (1):
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Jos Dirksen Jos Dirksen
Author Profile Icon Jos Dirksen
Jos Dirksen
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Table of Contents (10) Chapters Close

Preface 1. Getting Started with D3 2. Basic Charts and Shapes FREE CHAPTER 3. Working with Hierarchical Data 4. Visualizing Graphs 5. Working with Geo Data 6. Visualizing Streaming Data 7. Voronoi Diagrams and Heatmaps 8. Custom Shapes and Paths and Using a Brush Selection 9. ES6, TypeScript, and External D3.js Libraries

Elections 2016 choropleth

For our first example, we're going to create an election map for the 2016 presidential election. In this map, we'll color the results of each individual county based on whether they voted democrat or republican. The map we create will look like this:

Additionally, we'll also show a list of small cubes below the map that show the results of the individual counties. These counties are ordered per state (as they already appear like that in our source data). Before we can do all this, we first need to collect the data, and prepare it for use in D3.

Preparing data

As we'll see in this chapter, when working with geo-related data, a lot of time is spent on preparing the data, and representing it is rather straightforward. For...

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