Sierra Leone Risk Assessment Indicators: District-Level Flood and Access Data

HeiGIT produced this dataset of flood risk assessment indicators for Sierra Leone aggregated at the administrative level 2 (district) scale. It integrates data from WorldPop, OpenStreetMap, and Google Earth Engine to provide demographic, infrastructure, and accessibility metrics. The records are structured to support structured risk assessments for flood hazards.

Use Cases

• Analyzing healthcare accessibility by comparing access_pop_hospitals_30min against total population
• Identifying high-risk areas for flood impact by correlating flood_exposure with children_u5 and elderly demographic counts
• Evaluating disaster coping capacity by mapping education_count and primary_healthcare_count across ADM2 regions

Strengths

• Aggregated at ADM2 level using standardized HDX COD-AB boundaries
• Integrates multi-source data from WorldPop, OSM, and Google Earth Engine
• Provides specific travel-time accessibility metrics (30min, 1h, 2h) via openrouteservice

Limitations

• Facility counts like education_count are dependent on OpenStreetMap contributor activity and may be incomplete in remote areas
• Demographic data is derived from WorldPop estimates rather than a direct recent census

Provenance

Source

HeiGIT (Heidelberg Institute for Geoinformation Technology)

Collection Method

Aggregated via the GAIA Pipeline using WorldPop, OpenStreetMap, and Google Earth Engine

Freshness

Last updated March 2026 according to source metadata.

Geography

Sierra Leone