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ArcGIS Pro

PostgreSQL – Listen and Notify Clients In Real Time

The promise of digital mapping is to provide a shared and real-time view of the state of the underlying system.

pg_eventserv is a free and open-source component that helps fulfill the promise of real-time event modeling and shared views in PostgreSQL.

By connecting to PostgreSQL and listening on specified channels, pg_eventserv captures database notifications and forwards them to web clients, enabling real-time updates and synchronization of data displayed on maps or other web interfaces.

pg_eventserv does one thing and one thing only: take events generated by the PostgreSQL NOTIFY command and passes the payload along to waiting WebSockets clients.

pg_eventserv is free and easy to install and you can find it here:

What this means is that any client can watch for notifications and update as changes in the database happen.

Real-time data!

Here is a link to a Youtube video demonstration of pg_eventserv in action! 

I will let Paul Ramsey the creator of pg_eventserv explain all this in more detail in this episode. 

If you want to reach out to Paul the best place to do that is 

Or if you want to listen to previous episodes with Paul you might find these interesting

Raster in the database?

Dynamic Vector Tiles Straight From The Database

Spatial SQL- GIS Without The GIS


also …  If you are interested in spatial databases at scale … you might find this episode interesting



About the Author
I'm Daniel O'Donohue, the voice and creator behind The MapScaping Podcast ( A podcast for the geospatial community ). With a professional background as a geospatial specialist, I've spent years harnessing the power of spatial to unravel the complexities of our world, one layer at a time.