QGIS provides a powerful open source environment for managing, editing, and visualizing geospatial data. However, collaboration around QGIS projects often remains fragmented. Production teams need centralized data storage, reliable synchronization between desktop and web environments, controlled multi-user editing, conflict-resolution tools, and a clear record of changes.

This presentation introduces an open source workflow for collaborative geospatial data management based on QGIS, NextGIS Web, and the NextGIS Connect plugin.

NextGIS Web acts as the server-side platform for storing, managing, and publishing geospatial resources. It provides granular access permissions and built-in version control for vector data.

NextGIS Connect links the desktop and server environments. The plugin allows users to publish QGIS projects as web maps, open existing web maps as QGIS projects, edit server-hosted data from QGIS, synchronize changes, and resolve concurrent-editing conflicts interactively.

Recent developments extend this workflow to feature attachments, including photographs, documents, and other files associated with spatial features. Attachments can be managed consistently through both QGIS and the web interface, while their additions, modifications, and deletions are recorded alongside geometry and attribute changes.

The talk will demonstrate practical multi-user scenarios and explain how synchronization, permissions, conflict resolution, and version history work across the stack. It will also show how organizations can evolve from isolated local QGIS projects toward a shared, auditable, and fully open source collaborative GIS environment.