D3.js is a web-based data visualization library that utilizes JavaScript, HTML, SVG and CSS to create a variety of data visualizations. D3.js is a powerful library with many uses.

This task sheet specifically focuses on the map making ability of D3.js and demonstrates how to make a web map using GeoJSON formatted geographic data, as well as introduce you to the wide range of projections that can be used to display a map in D3.js.