Asbuilt modeling of Nnamdi Azikiwe University, Awka
Abstract
This project looked to address Nnamdi Azikiwe University’s struggle with insufficient office buildings and lack of available as-built maps that show the current state of development within the campus. The aim of the project was achieved by employing aerial photogrammetry to produce as-built maps showing the current developments within the campus. The DJI Phantom 4 drone was used to fly a flight mission plan that was created in 41 paths and uploaded to drone deploy. A total of 2,717 images, with 75% front overlap and 65% side overlap, were taken and collected by the UAV. The accuracy of the derived products from the UAV mapping was examined using a total of 120 GCPs. An orthophoto and Digital Terrain Model (DTM) were produced using a typical photogrammetric workflow. When the results were compared to the first order controls within the school grounds, they showed a closely fitting orthographic image with a correlation value of 0.99. The derived DTM also demonstrated good geometric accuracy, with horizontal and vertical accuracies of 0.22m and 0.43m, respectively, the orthophoto produced by the UAV operations allowed for the creation of an as-built model, which in turn helped determine the size of the campus grounds, the number of buildings, and the amount of space available for development. The campus's total area was 823 hectares, with 70 buildings already built there. Ten more buildings were still under construction at the time of capture, leaving 512 hectares of the campus' total area available for future development.
How to Cite This Article
Obiorah IE, Onwuzuligbo CU, Anyadiegwu PC (2024). Asbuilt modeling of Nnamdi Azikiwe University, Awka . International Journal of Multidisciplinary Research and Growth Evaluation (IJMRGE), 5(3), 354-359.