Book Image

Learning Responsive Data Visualization

By : Christoph Körner
Book Image

Learning Responsive Data Visualization

By: Christoph Körner

Overview of this book

Using D3.js and Responsive Design principles, you will not just be able to implement visualizations that look and feel awesome across all devices and screen resolutions, but you will also boost your productivity and reduce development time by making use of Bootstrap—the most popular framework for developing responsive web applications. This book teaches the basics of scalable vector graphics (SVG), D3.js, and Bootstrap while focusing on Responsive Design as well as mobile-first visualizations; the reader will start by discovering Bootstrap and how it can be used for creating responsive applications, and then implement a basic bar chart in D3.js. You will learn about loading, parsing, and filtering data in JavaScript and then dive into creating a responsive visualization by using Media Queries, responsive interactions for Mobile and Desktop devices, and transitions to bring the visualization to life. In the following chapters, we build a fully responsive interactive map to display geographic data using GeoJSON and set up integration testing with Protractor to test the application across real devices using a mobile API gateway such as AWS Device Farm. You will finish the journey by discovering the caveats of mobile-first applications and learn how to master cross-browser complications.
Table of Contents (16 chapters)
Learning Responsive Data Visualization
About the Author
About the Reviewer

Maps and projections

As we already saw in the first section of this chapter, there are multiple possible ways of mapping a 3D world into a 2D plane; whereas in all of these methods, some information is lost.

Let's make a little brain experiment. Think about what you would have to do to map the surface of a sphere into the plane. First, you would have to pick a hole somewhere into the surface. Then, you could stretch the surface as long it fits into the plane. However, we introduce a topology violation now at the exact point where we picked the hole. We can easily see that if you move outside of the left side of the map, you should theoretically enter on the right side again; but in our 2D representation, we lost this property, and the two sides are no longer connected. The second problem is that we also introduced a distortion when stretching the surface into the plane. Now, the top and bottom regions in the map seem to be bigger; we could not preserve the equality of the areas. If you look...