| Popis: |
Orthophoto is a part of the process of concept of photogrammetry in map production. Orthophoto image is a specific scaled photographic image produced from perspective images in which distortion errors originating from the attitude differences and the tilt of image are eliminated while orthophoto map is an orthophoto that has cartographic information on it (legend, grids, contours, labels, etc.). The development of current technology has introduced the Unmanned Aerial Vehicles (UAV) as an alternative to conventional photogrammetry in creating orthophoto map. Purpose of this paper is to identify the potential of Unmanned Aerial Vehicles (UAV) as an alternative to conventional photogrammetry which uses aircraft in creating orthophoto map. The area of the study is UniversitiTun Hussein Onn Malaysia (UTHM) Pagoh Campus within Pagoh Educational Hub. UAV photogrammetry based on a photogrammetricmeasurement platform, which operates remotely controlled, semi-autonomously, or autonomously, without a pilot sitting in the vehicle. The large format aerial camera in conventional photogrammetry is replaced with small format digital camera in UAV photogrammetry. For general area, the amount of forward overlap and side overlap is 75% and 60% respectively. For forest area, the amount of forward overlap and side overlap is 85% and 70% respectively as the UAV flight altitude will be higher. The whole workflow is introduced in the paper, where 461 images were collected with DJI Phantom 4 Pro with camera model FC6310. The flight mission was completed using PIX4D Capture. An orthophoto map covering an area of 250458 m2 was produced using AgisoftPhotoScan. The result from this study produces a better quality orthophoto map of UTHM Pagoh Campus. This map will shows the overview of the campus area with the most updated information. |
