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Learning D3.js Mapping

Learning D3.js Mapping

By : Newton, Oscar Villarreal
4.3 (7)
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Learning D3.js Mapping

Learning D3.js Mapping

4.3 (7)
By: Newton, Oscar Villarreal

Overview of this book

If you are interested in creating maps for the web GIS data, this book is for you. Familiarity with D3.js will be helpful but is not necessary.
Table of Contents (9 chapters)
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Preface
Preface
What this book covers
What you need for this book
Who this book is for
Conventions
Reader feedback
Customer support
Free Chapter
1
1. Gather Your Cartographer's Toolbox
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1. Gather Your Cartographer's Toolbox
Quick bootstrap
Step-by-step bootstrap
Optimizing geographic data files with TopoJSON
Using the web browser as a development tool
Summary
2
2. Creating Images from Simple Text
2. Creating Images from Simple Text
Introduction – general knowledge
Positioning elements
Line
Rectangle
Circle
Polygon
Path
Transform
Grouping
Text
Summary
3
3. Producing Graphics from Data – the Foundations of D3
3. Producing Graphics from Data – the Foundations of D3
Creating basic SVG elements
Enter
Update
Exit
AJAX
Summary
4
4. Creating a Map
4. Creating a Map
Foundation – creating your basic map
Experiment 1 – adjusting the bounding box
Experiment 2 – creating choropleths
Experiment 3 – adding click events to our visualization
Experiment 4 – using updates and transitions to enhance our visualization
Experiment 5 – adding points of interest
Experiment 6 – adding visualizations as a point of interest
Summary
5
5. Click-click Boom! Applying Interactivity to Your Map
5. Click-click Boom! Applying Interactivity to Your Map
Events and how they occur
Experiment 1 – hover events
Experiment 2 – tooltips with visualizations
Experiment 3 – panning and zooming
Experiment 4 – orthographic projections
Experiment 5 – rotating orthographic projections
Experiment 6 – dragging orthographic projections
Summary
6
6. Finding and Working with Geographic Data
6. Finding and Working with Geographic Data
GeoData file types
Summary
7
7. Testing
7. Testing
Code organization and reusable assets
Project structure
Writing testable code
Unit testing
Creating resilient visualization code
Summary
8
Index
Index

Chapter 1. Gather Your Cartographer's Toolbox

Welcome to the world of cartography with D3. In this chapter, you will be given all the tools you need to create a map using D3. These tools exist freely and openly, thanks to the wonderful world of open source. Given that we are going to be speaking in terms of the Web, our languages will be HTML, CSS, and JavaScript. After reading this book, you will be able to use all three languages effectively in order to create maps on your own.

When creating maps in D3, your toolbox is extraordinarily light. The goal is to focus on creating data visualizations and remove the burden of heavy IDEs and map-making software. The building blocks are as follows:

  • Quick bootstrap: We will cover installing Node.js, npm, and a lightweight server.
  • TopoJSON: We will see the working of this tool that is used to manage and optimize geographic information.
  • Web browser as a development tool: We will learn how to use a modern web browser, capable of rendering SVG files with built-in development tools. Some examples of common web browsers are Chrome, Firefox, Safari, and IE 9+.

    Note

    All screenshots and commands in this book have been done using Chrome. Therefore, we strongly recommend you to use this browser.

  • Installing sample code: We will take the first steps in getting to grips with coding.
  • Working with developer tools: We will get familiar with developer tools.
End of Section 1
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