LAGOS SEA LEVEL IMPACT PROJECTION TOOL
ABOUT TOOL

ABOUT TOOL

FEATURES

This tool offers a range of interactive features to help users explore the projected impact of sea level rise on Lagos State, Nigeria:

Zoom in and Zoom Out The two top buttons on the left, marked + and -, are used to zoom in and zoom out, respectively. Additionally, on mobile devices, you can use a two-finger gesture to zoom in and out. On a computer, the mouse can be used for zooming.

Geo-Location: Search for locations within Nigeria by entering place names or geographic coordinates.

Two Basemaps: Easily switch between OpenStreetMap and Google Satellite view using the layer control button.

Adjust Data Opacity: Control the transparency of the overlaid elevation data for better map readability.

Interactivity: Click on any area within the Lagos map to view its elevation, the extent to which it could be affected by sea level rise, and the projected impact year.

SKILLS INVOLVED

The development of this tool involves a combination of various skills, including front-end development, web mapping using Leaflet, and research experience.

POSSIBLE IMPROVEMENTS

This project can be enhanced to create a more robust and comprehensive tool. Potential improvements include:

Adding more IPCC scenarios.

Creating a backend to enable access using various digital elevation model (DEM) datasets.

Automating the tool to display annual sea-level rise under different IPCC scenarios.

Expanding the tool’s coverage to allow global visualization. Note that sea-level rise differs from place to place. Check the About section to learn more.

You can access the code for the entire tool via: github

ABOUT DATA

ABOUT DATA

Digital Elevation Model (DEM): The DEM data was sourced from the Copernicus Global 30m Digital Elevation Model and downloaded via Google Earth Engine (GEE). A spatial resolution of 30 meters was used to ensure accurate elevation representation across Lagos State. Using the fill tool in QGIS software, the sinks in the DEM were removed. For additional information, visit the Copernicus Data Space Ecosystem.

Shared Socioeconomic Pathways (SSP) Projection Values: Sea-level rise projection values for the years 2100 and 2140 were acquired from NASA’s Sea-Level Projection Tool. These values serve as the baseline for setting the model parameters and reflect the scenarios outlined in the Intergovernmental Panel on Climate Change (IPCC) 6th Assessment Report (AR6). For additional information, visit the NASA Sea-Level Projection Tool.

ABOUT BASE MAPS: The tool utilizes satellite imagery from Esri and OpenStreetMap.

Learn more about OpenStreetMap here.

Learn more about Google Satellite here.

ABOUT THE DEVELOPER

ABOUT THE DEVELOPER

Adedewe Abiodun is a Geospatial and Front-end Developer. passionate about using geospatial technology and web development to better represent real-world phenomena. He believes that maps can tell stories more effectively.

As a graduate of Meteorology and Climate Science from the Federal University of Technology, Akure, he created this tool to better represent sea-level rise impact based on the Intergovernmental Panel on Climate Change (IPCC) projections. Having done his undergraduate research on a very similar topic which is Modelling Sea Level Rise Impact on Land use and Land Cover classification over Lagos State, Nigeria. [Link to Abstract]

He is open to professional opportunities, including roles in development, project collaborations, research partnerships, and graduate programs.

You can reach out or Connect with the developer via:

  • GitHub
  • Email
  • LinkedIn

Lagos Sea Level Rise Impact Tool: Visualising Projected Coastal Exposure under IPCC Scenarios

The Lagos Sea Level Rise Impact Tool is designed to enable users to visualise the projected impact of sea level rise across Lagos State, Nigeria, based on the Shared Socioeconomic Pathways (SSP) emission scenarios outlined in the Intergovernmental Panel on Climate Change (IPCC) 6th Assessment Report (AR6) for the years 2050, 2100 and 2150. The tool classifies Digital Elevation Model (DEM) data sourced from the Copernicus mission, with a spatial resolution of 30 meters, into distinct elevation categories corresponding to potential sea level rise scenarios.

By overlaying this classified data onto base maps, including OpenStreetMap and Google Satellite imagery with label, the tool identifies roads, buildings, and infrastructures that would likely be affected under various sea level rise conditions. This platform is intended as a decision-support and awareness-raising tool for urban planners, policymakers, researchers, and the general public, helping to inform climate resilience strategies and spatial planning initiatives.

Note: This tool is intended solely for the visualization of sea level rise exposure via an interactive map. It does not simulate or predict related hazards such as flooding, soil erosion, or other environmental events. Developed by Abiodun Adedewe.

Copyright © 2025 Abiodun Adedewe.