THIRD ORDER CONTROL EXTENSION ALONG MAIDUGURI AND GUJBA ROAD, DAMATURU, YOBE STATE.
Abstract
ABSTRACT
Accurate geodetic control is critical for urban planning, engineering surveys, and GIS applications. This study focused on extending third-order geodetic control from Federal Polytechnic Damaturu to six key institutions within Damaturu metropolis using Differential Global Positioning System (DGPS). The methodology involved office and field reconnaissance, beaconing and monumentation, static DGPS observations, data processing with Hi-Target GeoOffice, and mapping in AutoCAD. Concrete beacons with brass caps were established at each control station. The results demonstrated centimeter-level positional accuracy, with horizontal and vertical errors within ±0.015 m and ±0.025 m, respectively. The spatial distribution map confirmed uniform coverage, while descriptive tables documented location, accessibility, and monumentation details for all stations. The study concludes that DGPS is an efficient and reliable method for extending urban control networks, providing consistent spatial reference for engineering, cadastral, and GIS applications. Recommendations include adopting RTK DGPS for real-time surveys, periodic maintenance of beacons, expansion of the control network to other urban areas, and integration of the coordinates into centralized GIS databases for long-term use.
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