How to Make an Interactive Map of Geographic Paths

With latitude and longitude coordinates, there are a number of ways to map geographic data using D3.js and Leaflet.

This tutorial shows several ways of visualizing geographic point data using JavaScript. You’ll visualize the data in a web browser using JavaScript libraries D3 and Leaflet and learn how to:

  • Visualize all the point data
  • Visualize the running routes by joining the points
  • Use opacity to get a sense of the most popular routes
  • Animate the points along the routes
  • Show the routes on a interactive map

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About the Author

Peter Cook is a freelance data designer and developer. He's also the author of D3 in Depth and Create With Data. You can find him on Twitter @animateddata and his personal site Animated Data.