Let's start by executing our first spatial analysis query from Python against our already running PostgreSQL and PostGIS database. The goal is to generate a 100 m buffer around all schools and export the new buffer polygon to GeoJSON, including the name of a school. The end result will be shown on this map, available (https://github.com/mdiener21/python-geospatial-analysis-cookbook/blob/master/ch04/geodata/out_buff_100m.geojson) on GitHub.
Tip
Quick visualizations of GeoJSON data using GitHub is a fast and simple way to create a web map without coding a single line. Note that the data is then free for everyone else to download if you are using a public and free GitHub account. Private GitHub accounts mean the data, that is, GeoJSON, will also remain private if data privacy or sensitivity is an issue.