Welcome to Day 7 of our #30DayMapChallenge series! We dedicate today’s map to the crucial theme of Accessibility—mapping how people get around, with a focus on inclusive design and overcoming mobility barriers.
Today’s theme: Accessibility
AT A GLANCE:
- Focus: Analyzing Lagos’s road network (Lines) to assess universal mobility and inclusivity for persons with disabilities.
- Legal Milestone: The Special People’s Law (2011) mandates accessible infrastructure.
- The Geospatial Reality: Analysis reveals that fewer than 30% of surveyed roads meet optimal accessibility standards.
- Data-Driven Action: Using OpenStreetMap tags (ramps, tactile paving, smoothness) to quantify infrastructure gaps and guide retrofitting.
Reading time: 3 minutes | Map Challenge Day: 7 of 30 | Theme: Accessibility
The Map: Where Equity Meets the Street Grid
This map visualization (conceptualized here) highlights the lines of connectivity in Lagos, differentiating between simple transport infrastructure and truly inclusive infrastructure. Accessibility is not just about movement; it is about ensuring that everyone—regardless of ability—can navigate their environment safely, independently, and with dignity.
GRID3 NGA - Settlement and Infrastructure Data
Note: This visualization shows the spatial distribution of Nigeria’s road network. Road classification and condition data reflect available open data sources and may not capture recent infrastructure developments.
Our analysis targets key line-and-node features on the street grid that determine obstacle-free travel for users of wheelchairs, mobility aids, and visually impaired individuals:
| Feature | OSM Tag Analysed | Mobility Reason |
|---|---|---|
| Ramps | [“ramp”=“yes”] | Provides the necessary slope for wheelchair users to ascend or descend changes in elevation. |
| Lowered Kerbs | [“kerb”~“lowered|flush”] | Eliminates the vertical step at crossings, vital for easy passage from the sidewalk to the road. |
| Tactile Paving | [“tactile_paving”=“yes”] | Crucial aid for the visually impaired, providing textured warnings and directional guidance. |
| Smoothness | [“smoothness”~“excellent|good”]` | Surface quality to reduce jarring and trip hazards, critical for wheelchair users and those with balance issues. |
| Paved Surface | [“surface”~“paved|asphalt|concrete”] | Provides a firm, stable base for maintaining control of mobility aids. |
️⚖️ The Inclusivity Challenge in Lagos
- Legislative Progress: Lagos State showed its commitment to inclusion with the Special People’s Law (June 2011), which mandates that all newly constructed roads and public facilities include essential accessibility amenities (walkways, ramps, etc.).
- The Geospatial Reality: Despite this legislative commitment, our analysis of road segments (lines) against the defined accessibility features revealed a persistent gap. Fewer than 30% of existing roads currently meet optimal accessibility standards for the physically challenged.
This finding underscores the importance of sustained investment in inclusive infrastructure and the need for data-driven monitoring to ensure that accessibility remains a core part of urban development planning.
🌉 Spatial Planning for an Inclusive Metropolis
Dataset:This map serves as a powerful call to action for spatial planners and engineers:
Prioritized Retrofitting: The analysis identifies specific, non-compliant road segments that require immediate infrastructure upgrades to meet accessibility standards.
Monitoring Compliance: Data-driven monitoring ensures that both new and renovated projects comply with the Special People’s Law mandates.
Connecting the Points: Making these crucial lines accessible ensures that all citizens can reach the critical points of care, education, and employment (like the health facilities mapped on Day 1).
About the #30DayMapChallenge
The #30DayMapChallenge is a daily mapping and cartography challenge throughout November. Created by Topi Tjukanov, it brings together the global geospatial community to explore creative ways of visualizing spatial data.
This is Day 7: Accessibility—using spatial data to examine barriers and advocate for universal mobility.
Over the next 28 days, we’ll continue exploring Nigeria’s spatial story through different cartographic lenses.
Tomorrow: Day 8 — Boundaries: Exploring Administrative Divisions and Cultural Borders in Nigeria.
Stay tuned as we return to polygons to map the defined and sometimes contested lines that separate communities and governance structures.
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Help us spread the word about Nigeria’s road infrastructure challenges!
Suggested post:
“Every line on this map is a lifeline. Mapping Nigeria’s road network reveals which communities are connected—and which remain isolated. #30DayMapChallenge #Nigeria #Infrastructure #SpatialAnalysis”
References
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Follow our #30DayMapChallenge series: Nexus Insights