Welcome to Day 8 of our #30DayMapChallenge series! Today, we focus on Urban — exploring the dense, vertical, and evolving built environment of Eti-Osa, Lagos, Nigeria.
Today’s theme: Urban
AT A GLANCE:
- Focus: Dense street networks, high-rise clusters, and built infrastructure in Eti-Osa
- Population Density: Over 5,000 residents per square kilometer
- Key Areas: Victoria Island, Ikoyi, Lekki — representing Lagos’s commercial and residential heart
- Data Source: OpenStreetMap and Overpass Turbo
- Method: Extraction and visualization of high-rise buildings, road networks, and urban structures
Reading time: 5 minutes | Map Challenge Day: 8 of 30 | Theme: Urban
The Map: Lagos from the Ground Up
This interactive map highlights the urban fabric of Eti-Osa — dense roads, sprawling buildings, and a remarkable concentration of high-rises.
Each red-highlighted structure represents buildings exceeding 10 floors or 30 meters in height, symbolizing Lagos’s growing skyline and evolving architectural identity.
High-rises concentrated in Victoria Island and Lekki serve as commercial hubs, residential apartments, and mixed-use complexes, reflecting Lagos’s transformation from a low-rise coastal city to a vertical megacity.
Urbanization in Perspective
Urbanization in Eti-Osa demonstrates both growth and sustainability challenges:
- Rising population density fuels demand for housing, transport, and green spaces
- Vertical expansion reflects adaptive strategies for geography-constrained urban growth
- Every building, road, and intersection tells a story of progress, resilience, and aspiration
Spatial Planning for a Sustainable City
At Nexus Engineering and Planning, we believe data-driven design supported by geospatial insights is key to resilient, inclusive urban systems.
This project shows that mapping is both technical and creative, where every line and polygon represents part of a living city.
OpenStreetMap & Overpass Turbo
Note: The visualization highlights high-rise buildings, roads, and urban density. Some small structures or recent constructions may not be captured.
How to Explore This Map
- Toggle layers: Buildings, high-rises, and roads for focused exploration
- Zoom in to examine density patterns and urban morphology
- Click structures to view attributes like height and building type
- Compare neighborhoods: Victoria Island, Ikoyi, and Lekki show contrasting urban density
- Trace vertical growth: Observe clusters of high-rise development
About the Data
Dataset: Our visualization contains buildings, high-rises, and road networks extracted from OpenStreetMap for Eti-Osa, Lagos.
Urban Layers:
Road networks: Paved and unpaved streets connecting all key areas
Buildings: Footprints of all mapped structures
High-rises: Buildings exceeding 10 floors or 30 meters
Urban Insights: Dense clusters of high-rises appear in Victoria Island, Ikoyi, and Lekki, showing commercial and residential hubs.
Why Map the Urban Landscape?
Mapping urban areas is critical to understanding growth, accessibility, and infrastructure patterns:
- Population pressure: Over 5,000 residents/km²
- Transportation networks: Dense roads facilitate movement but highlight congestion points
- Vertical growth: High-rise clusters indicate evolving land-use strategies
- Planning & resilience: Data helps inform sustainable urban planning and infrastructure investment
About the #30DayMapChallenge
The #30DayMapChallenge is a global, daily mapping and cartography challenge throughout November. Created by Topi Tjukanov, it inspires geospatial professionals and enthusiasts to explore spatial data creatively.
This is Day 8: Urban — celebrating World Urbanism Day and exploring the built environment of Eti-Osa, Lagos.
Tomorrow: Day 9 — Analog: Create maps using traditional methods like pen, pencil, or collage. Celebrate the artistry behind cartography.
Share This Map
Want to explore Lagos’s urban data further? Contact us
Follow our #30DayMapChallenge series: Nexus Insights