To the extent that people know about Geographic Information Systems (GIS), it’s often because of ArcGISPro, the flagship software by ESRI. It’s incredible software and it’s very good at what it does. But it’s also very expensive, only operates on Windows and locks users into a software ecosystem that is difficult to get out of. Fortunately, there are open source alternatives that are just as capable of doing the many jobs that were once the sole domain of ESRI.