GIS-BASED MAPPING OF UNDERGROUND FIBER OPTIC NETWORKS USING DIFFERENTIAL GPS: EVIDENCE FROM THE UNIVERSITY OF ILORIN CAMPUS

Purpose: Accurate mapping and management of underground fibre optic infrastructure are critical for ensuring network reliability, minimising service disruptions, and supporting sustainable infrastructure planning. This study aims to develop a high-precision geospatial framework for mapping underground fibre optic cable networks within the University of Ilorin campus using Differential Global Positioning System (DGPS) integrated with Geographic Information System (GIS) technology.

Design/methodology/approach: High-accuracy spatial data of underground fibre optic cable routes connecting academic, administrative, and research buildings were collected using DGPS. Attribute data, including building functions, network capacity, cable characteristics, and connectivity details, were obtained through field observations and structured interviews with network personnel. Spatial and attribute datasets were integrated within a GIS environment to create a comprehensive digital geodatabase and detailed utility maps for visualisation, analysis, and asset management.

Findings: The study produced accurate and up-to-date digital maps of underground fibre optic cable networks across the campus. The DGPS-GIS integration significantly improved spatial accuracy and enhanced visualisation of utility infrastructure. The developed geospatial database supports efficient asset tracking, proactive maintenance planning, and informed decision-making for network expansion, thereby reducing the risk of accidental damage and service interruptions.

Research limitations/implications: Data acquisition was constrained in some areas by difficult terrain and dependence on heterogeneous attribute data sources. Nevertheless, the methodology demonstrates strong potential for adaptation and scaling in similar institutional and urban environments.

Practical implications: The resulting digital utility database serves as a decision-support tool for infrastructure managers, improving maintenance efficiency and coordination during development activities.

Originality/value: This study provides a replicable DGPS-GIS-based framework for underground fibre optic utility mapping, contributing to smart campus development and advancing digital infrastructure management practices in Nigeria.