ABSTRACT
This project is a third-order control extension at the Nigerian Army University Biu in Biu Local Government Area of Borno State. The project was executed using ground survey method and techniques with the aid of differential GPS (DGPS). Geometric data were acquired through: static mode and real-time kinematic mode. The acquired geometric data were deduced, processed and adjusted using appropriate computational formulae based on the third order specification. The project was analyzed and confirmed to fall within allowable misclosure and the linear misclosure was 1:10000. Also, after the confirmation of the point to be established, 13 sets of control framework were extended over a perimeter length of 2.9km and the final adjusted coordinates were used to produce a digital plan showing the third order control framework of the study area using a scale of 1:5000. Finally, the project report was written on each step involved. The aim of the project was achieved (i.e. third order control extension at Nigerian Army University Biu.) and shall contribute greatly to the area as a whole since it lacked controls for ease of survey jobs. Therefore, it is recommended that there should be public enlightenment on the need and importance of geodetic controls and also, control stations should be situated at points in which they are exposed to threats as a result of physical developments.…
