By Joyce Shinyi
The world recently commemorated World GIS Day, a moment that always focuses our attention on the critical role of mapping technology in public health. Here at eHealth Africa (eHA), the conversation is powered by tangible results, specifically those from our successful Geospatial Tracking System (GTS) Initiative. This initiative is built on a clear and essential goal: to ensure that the health services promised to people actually reach them, regardless of where they live.
As our moderator Tijesu Ojumu perfectly framed the context in our recent discussion, “At first glance, when you think about World Polio Day and World GIS Day, they may seem different. But in reality, they are deeply connected by one powerful idea: Health Equity.” This is the human-centered mission the GTS Initiative delivers on.
From Static Maps to Strategic Solutions
Our Insights webinar, “Driving Health Equity with Geospatial Information Systems,” focused on how GIS has evolved from a simple mapping tool into a strategic planning system. Before GTS, health officials often relied on paper-based records and anecdotal reporting, which created large “grey areas” where vaccination coverage was uncertain or falsified, leaving many settlements unvisited for years.
As expert Busayo Fashoto outlined, the system helps us go beyond simply plotting locations by helping us understand “what is there?” and, more importantly, “why is that thing there?” This allows us to make communities visible to the planning systems that often overlook them. Expert Oro-ghene (Oros) Adia further described GIS as a sophisticated relationship tool that builds trust by supplying high-quality data to enhance transparency and accountability in resource allocation. Sa’adatu Ibrahim, Kano State Immunization Officer, summarized the change: “Before GTS, we had difficulties in identifying unvisited areas. After GTS, we could see things crystal clear, these are the areas that still need to be visited“.
The GTS Initiative: Actionable Results in Polio and Beyond
The GTS Initiative provided essential tracking support to the national effort to interrupt circulating vaccine-derived poliovirus type 2 (cVPV2) transmission). Its clear mandate was to improve the geographical coverage of settlements, minimizing the number of missed communities.
Its impact from 2024 to 2025 demonstrates the effectiveness of this targeted approach. Between 2023 and 2025, the initiative contributed to vaccinating over 24.5 million children, while from April to November 2024 it supported activities across 120 Local Government Areas (LGAs), identifying 25,687 previously missed settlements and raising overall coverage from 88% to 90%. Momentum continued into 2025, with GTS tracking spanning 434 LGAs between April and June and achieving a 16% month-over-month coverage increase in June. During the Integrated Measles-Rubella campaign in October 2025, the system further strengthened accountability by recording verified visits in 144,518 settlements—93% of those planned; across 248 LGAs.
Overcoming Challenges and Building Local Capacity
In challenging regions like Northern Nigeria, achieving high coverage means overcoming insecurity, difficult terrain, and chronic network coverage gaps. The GTS Initiative institutionalized smart strategies to manage these constraints: GTS strengthened accountability by enabling real-time digital monitoring, which significantly improved field visibility and supported more responsive decision-making. Continuous validation of the Master List of Settlements (MLoS) ensured that planning data remained accurate, especially in rapidly expanding areas where new settlements can emerge within weeks; this ongoing updating process helped drive coverage improvements across states.
Equally important was the integration of localized expertise—the initiative found that involving local personnel had a positive impact, making the work easier, more accurate, and better aligned with on-the-ground realities. The GTS Initiative underscores a fundamental truth: the successful integration of technology, preparedness , and local capacity are non-negotiable for achieving high-coverage and accountability. For any organization scaling GIS solutions, the enduring lesson is to always start with the use case: the tangible, community-level problem rather than the technology itself.



