Geographic Information System (GIS) data can come in a lot of forms, which can lead to confusion in how to represent data. One popular solution is GeoJSON, a data standard that was created by the Internet Engineering Task Force and defines a way to organize GIS data in the JSON format natively supported by the majority of web development languages, libraries, and frameworks. In this article we’ll look at the GeoJSON format, then use a GeoJSON data set to draw regional borders on a map with TomTom JavaScript Maps SDK for Web.