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  • Book Overview & Buying Learning D3.js Mapping
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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
Buy this Book

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
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Preface
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What this book covers
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What you need for this book
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Who this book is for
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Conventions
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Reader feedback
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Customer support
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1
1. Gather Your Cartographer's Toolbox
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1. Gather Your Cartographer's Toolbox
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Quick bootstrap
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Step-by-step bootstrap
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Optimizing geographic data files with TopoJSON
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Using the web browser as a development tool
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Summary
2
2. Creating Images from Simple Text
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2. Creating Images from Simple Text
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Introduction – general knowledge
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Positioning elements
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Line
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Rectangle
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Circle
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Polygon
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Path
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Transform
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Grouping
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Text
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Summary
3
3. Producing Graphics from Data – the Foundations of D3
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3. Producing Graphics from Data – the Foundations of D3
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Creating basic SVG elements
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Enter
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Update
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Exit
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AJAX
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Summary
4
4. Creating a Map
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4. Creating a Map
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Foundation – creating your basic map
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Experiment 1 – adjusting the bounding box
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Experiment 2 – creating choropleths
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Experiment 3 – adding click events to our visualization
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Experiment 4 – using updates and transitions to enhance our visualization
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Experiment 5 – adding points of interest
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Experiment 6 – adding visualizations as a point of interest
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Summary
5
5. Click-click Boom! Applying Interactivity to Your Map
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5. Click-click Boom! Applying Interactivity to Your Map
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Events and how they occur
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Experiment 1 – hover events
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Experiment 2 – tooltips with visualizations
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Experiment 3 – panning and zooming
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Experiment 4 – orthographic projections
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Experiment 5 – rotating orthographic projections
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Experiment 6 – dragging orthographic projections
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Summary
6
6. Finding and Working with Geographic Data
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6. Finding and Working with Geographic Data
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GeoData file types
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Summary
7
7. Testing
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7. Testing
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Code organization and reusable assets
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Project structure
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Writing testable code
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Unit testing
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Creating resilient visualization code
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Summary
8
Index
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Index

Chapter 7. Testing

In this chapter, we will cover several topics that will assist you in the long-term maintenance of your D3 code base. The goal is to create a foundation to build reusable assets that can be easily unit tested while leveraging popular tools and techniques already established in the JavaScript community.

Unit testing is important in any software development project, especially in a D3 code base. Typically, these projects involve a lot of code that applies analytics or manipulates data structures. For these types of problems, unit testing can help in the following ways:

  • Reduce bugs: An automated test suite will allow the developer to break down and test individual components. These tests will be run constantly throughout the development cycle, validating that future features do not break older working code.
  • Document accurately: Often, tests are written in a human-readable way; this precisely describes the problem they are testing against. An example of the code provides...
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Programming languages
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Learning D3.js Mapping
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