Web GIS Development with JavaScript and PostGIS

Build web maps that people can search, edit, and use to answer real location questions.
You know the value of GIS data. Now learn how to turn it into an interactive application that helps people find facilities, compare locations, and understand the results.
Web GIS Development with JavaScript and PostGIS takes you from your first Leaflet map to a connected facility finder and site-screening project. You'll build the browser interface, connect it to a spatial database through a Node.js and Express API, and learn how to check that the application is answering the right question.

As you build, you'll learn to:

• Make geographic data easier to use. Add search, filters, popups, and coordinated results so users can find relevant information quickly.
• Check your spatial answers. Use spatial SQL in PostGIS to measure distances, identify nearby facilities, and avoid mistakes with coordinates, units, and geometry.
• Explain site rankings. Apply coverage zones, exclusions, and transparent scoring so users can see why a candidate qualifies-and how changing priorities affects the shortlist.
• Protect data during editing. Validate inputs, control access, and handle conflicting changes without silently overwriting another person's work.
• Keep growing maps responsive. Use spatial indexes, query plans, clustering, and request cancellation to reduce unnecessary work.
• Prepare for a dependable handover. Learn practical testing, Docker deployment, HTTPS configuration, backup, and recovery workflows.