Python libraries are the ultimate extension in GIS because it allows you to boost its core functionality.  By using Python libraries, you can break out of the mold that is GIS and dive into some serious data science.  There are 200+ standard libraries in Python. But there are thousands of third-party libraries too. So, it’s endless how far you can take it.  This article covers the 15 most popular Python packages that most GIS professionals tend to use.