GeoJSON is an open standard data format for encoding geographic data structures using JavaScript Object Notation and supports the following geometry types: point, line, polygon, multi-point, multi polygon. It’s a file format supported by many different web mapping and GIS software packages including: Leaflet, OpenLayers, CartoDB, Google Maps API, ArcGIS Online, GitHub, and D3.js.

This task sheet will take you through the process of converting a shapefile to GeoJSON using the Ogre ogr2ogr web client and show you how to visualize GeoJSON data. Find more information about the JSON data format in Web Mapping: Getting started with JSON data PM 2082-14F.