Area Frame Management
A geospatial management system for the Area Frame Polygons of Pakistan, enabling surveyors and administrators to view, edit, and manage land boundary data used in national statistical operations like Census.
Features
- Interactive polygon viewing and editing via Leaflet
- Boundary collision detection and alerts
- Tasks assignment with approval/rejection from relevant teams
- RBAC-controlled access for GIS team, surveyors, supervisors, and admins
- Coverage management and access policies
- GIS data import/export with standard formats
- Audit history for all polygon modifications
Tech Stack
ReactTypeScriptNode.jsPostgreSQLLeafletTailwindZustandOpenStreetMapsGISRBAC
Key Insights
- Import pipeline for geospatial data required handling various formats and ensuring data integrity during transformations
- Leaflet's plugin ecosystem made complex GIS interactions like polygon editing achievable without a full GIS platform
- Virtualization was required to display thousands of polygons at each hierarchical levels
- Implementing robust collision detection was critical to prevent overlapping boundaries and ensure data integrity
- Role-based access control was essential to allow different levels of users to interact with the system appropriately while protecting sensitive geospatial data
- Audit history provided transparency and accountability for all polygon modifications
- GIS data import/export capabilities allowed for integration with other systems and facilitated data maintenance