GISClient work
Mapping environmental risk zones
A GIS platform used by public agencies to draw, validate and publish flood, erosion and cyclone risk zones across Madagascar.
- Role
- Full-stack developer
- Client
- NOGAE
- Year
- 2022
Context
Official risk zones lived in scattered files with no validation process.
What I built
- 01Polygon drawing and editing on the map
- 02Geospatial queries and tile rendering at any zoom
- 03Validation rules and an approval pipeline
Key decisions
Validation in the database
Overlap detection and minimum-area rules run in PostGIS, so no invalid zone reaches the official record.
Outcome
Zones are drawn, checked and approved in one place.