How to Build a Choropleth Map in JavaScript

• AnyChart

  31 372 3.4 JavaScript

  AnyChart is a lightweight and robust JavaScript charting solution with great API and documentation. The chart types and unique features are numerous, the library works easily with any development stack.

  

To easily create data visualizations for the web, I use a JavaScript charting library with in-built utilities and functions. With the vast number of such JS libraries available, the process for creating charts and maps is similar in essence and logic across most of them. In this tutorial, I am using the AnyChart JS charting library as it is beginner-friendly with extensive documentation and plenty of examples to help you get started.

• proj4js

  10 1,938 6.1 JavaScript

  JavaScript library to transform coordinates from one coordinate system to another, including datum transformations

  

It is needed to link the required JS scripts in the section of the HTML page. These scripts include the Core and Geo Maps modules and the file that contains geodata for the world map, all of which are available on the CDN. I'll also use two more script files to connect the data to the choropleth map. One is the Data Adapter, which will help load the data, and the other is Proj4js, a JavaScript library that will transform the coordinates from one coordinate system to another so the data can be plotted on the map accurately.

• SurveyJS

  surveyjs.io sponsored

  Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App. With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js.

  

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