A recent CHA project

The Watervliet Interactive Mapping Application is a web-based GIS platform built entirely on Open Source components and technologies, including PostGIS, OpenLayers, and GeoEXT.

This has been a fun little project and a departure from the norm- as there is no GeoServer backend powering this application. All of the vector data is stored in a PostGIS database and fetched as needed via a few custom PHP scripts. Data is exchanged in GeoJSON format and the larger datasets (parcels, buildings) are limited by the user viewport extent.

This method works great for a municipality with a relatively small geographic footprint and dramatically simplifies the system architecture.