Book Image

Expert Data Visualization

By : Jos Dirksen
Book Image

Expert Data Visualization

By: Jos Dirksen

Overview of this book

Do you want to make sense of your data? Do you want to create interactive charts, data trees, info-graphics, geospatial charts, and maps efficiently? This book is your ideal choice to master interactive data visualization with D3.js V4. The book includes a number of extensive examples that to help you hone your skills with data visualization. Throughout nine chapters these examples will help you acquire a clear practical understanding of the various techniques, tools and functionality provided by D3.js. You will first setup your D3.JS development environment and learn the basic patterns needed to visualize your data. After that you will learn techniques to optimize different processes such as working with selections; animating data transitions; creating graps and charts, integrating external resources (static as well as streaming); visualizing information on maps; working with colors and scales; utilizing the different D3.js APIs; and much more. The book will also guide you through creating custom graphs and visualizations, and show you how to go from the raw data to beautiful visualizations. The extensive examples will include working with complex and realtime data streams, such as seismic data, geospatial data, scientific data, and more. Towards the end of the book, you will learn to add more functionality on top of D3.js by using it with other external libraries and integrating it with Ecmascript 6 and Typescript
Table of Contents (10 chapters)

Exporting visualizations

When we create a visualization and we want to export it, we can use two different approaches. We can export it as a bitmap image (for example, PNG) or we can export it as a vector image (SVG format). In this section, we'll look at both approaches.

Exporting visualizations as PNG

To export an SVG element as a PNG, we need to take a couple of steps. Let's first get one of our visualizations that we want to export. We'll work with one of the geographic examples from Chapter 5, Working with Geo Data (D05-01.html):

To export this map, we'll take the following steps:

  1. Create a separate CSS for the styles we want to apply.
  2. Convert the SVG element to a string.
  3. Use the canvas to get a PNG file.
  4. Save the content from the canvas...