| --- |
| language: |
| - en |
| license: odbl |
| tags: |
| - geospatial |
| - nigeria |
| - hospitals |
| - infrastructure |
| pretty_name: Nigeria Hospitals Accessibility Indicators |
| size_categories: |
| - 10K<n<100K |
| --- |
| |
| # Nigeria Hospitals Accessibility Indicators |
|
|
| This dataset provides insights into spatial accessibility to hospital services across Nigeria. It uses travel-time isochrones to calculate the population within time intervals from 10 to 120 minutes away. |
|
|
| ## Data Structure |
|
|
| - **name:** Region or country name. |
| - **iso:** ISO3 country code. |
| - **id:** Unique identifier for the administrative unit. |
| - **country:** ISO3 country code. |
| - **admin_level:** Administrative level of the unit (ADM1-ADM4). |
| - **category:** hospitals. |
| - **range_type:** time. |
| - **range:** Time away (in seconds) from hospitals used to generate the polygon. |
| - **population:** Total population within the specified range. |
| - **population_share:** Cumulative percentage of total population. |
| - **population_interval:** Incremental population added in the current time band. |
| - **population_interval_share:** Share of the total population represented by the current interval. |
|
|
| ## Files |
| - `NGA_hospitals_access_long.parquet`: Detailed interval data. |
| - `NGA_hospitals_access_wide.parquet`: Aggregated data per administrative unit. |
| - `NGA_hospitals_access.gpkg`: Geospatial polygons for the accessibility zones. |
|
|
| ## Methodology |
| Accessibility is assessed using travel-time isochrones overlayed with WorldPop population data (100m resolution). |
|
|
| ## Limitations |
| - **OSM Completeness:** Relies on OSM data; quality varies by region. |
| - **Population Estimates:** Based on statistical models (WorldPop top-down estimates), not direct census counts. |
| - **Travel Time Assumptions:** Models do not account for real-time traffic, seasonal weather (e.g., flooding), or road degradation. |
| - **Boundary Precision:** Boundaries from geoBoundaries may differ from official government demarcations. |
|
|
| ## Source |
| Created using openrouteservice and OpenStreetMap data. |
| HeiGIT (Heidelberg Institute for Geoinformation Technology). |
| [Open Healthcare Access Map](https://healthcareaccess.heigit.org/) |
|
|
