Service Access Mapper
Generate travel-time catchments (isochrones) to services using road networks, estimate population coverage using WorldPop data, and summarize statistics by admin boundaries.
Service Access Mapper computes travel-time catchment areas (isochrones) around service points such as health facilities, schools, and other amenities using road network analysis.
Features:
- Travel-time and distance isochrone generation with customizable thresholds
- Three speed models: field-based, road class mapping (with Ghana defaults), constant
- Automatic WorldPop population raster download with country auto-detection
- Per-threshold population coverage breakdown (band and cumulative)
- Coverage statistics by administrative boundaries with population percentages
- Underserved area identification with population estimates
- Distance decay analysis from demand points to services
- Service point snapping to road networks
- Background processing with progress feedback
- Profile save/load for reusable configurations
- CSV export of admin and population statistics
No external Python packages required — uses only PyQGIS, QGIS Processing, and Python standard library.