Dissertation/ Thesis
Fusion model of unmanned aerial vehicle-based digital elevation model for accuracy improvement mapping
| Τίτλος: | Fusion model of unmanned aerial vehicle-based digital elevation model for accuracy improvement mapping |
|---|---|
| Συγγραφείς: | Isola, Ajibola Ismaila |
| Έτος έκδοσης: | 2020 |
| Συλλογή: | Universiti Putra Malaysia: PSAS (Perpuskataan Sultan Abuld Samad) Institutional Repository |
| Θεματικοί όροι: | Drone aircraft - Mathematical models - Case studies, Vehicles, Remotely piloted, Drone aircraft - Computer networks |
| Περιγραφή: | Most construction projects require accurate Digital Elevation Model (DEM) data adhere to a certain standard of accuracy both in the horizontal and vertical components. However, due to the DEM inherent errors, it has been a major research concern to generate accurate DEM over large and inaccessible areas in a cost and time effective manner. Hence, the fusion of UAV-based DEMs. This study aimed: (i) to develop models for investigating the effect of Atmospheric Pressure (AP) on DEMs generated from fixed-wing UAV platform, (ii) to develop a methodological approach for determining an optimum flying altitude for UAV cadastral mapping and (iii) to develop fusion and filtering algorithms for improving the vertical accuracy of DEM generated by UAV systems. Before aerial photography, forty-five ground control points (GCPs) were established evenly in the study area using a real-time kinematic differential global positioning system for georeferencing and quality assessment of UAV products (DEM and orthoimage). Regarding the first objective, a canon digital camera onboard fixed-wing UAV was flown over UniPutra golf club in the Universiti Putra Malaysia campus at an altitude of 100 m, 150 m, 200 m, 250 m, 350 m, 400 m, and 500 m. The onboard camera took a series of overlapping photographs of the study area at a predefined three seconds regular time interval. The photos were processed using Agisoft algorithm. In the end, seven DEMs were exported in tiff file format. The DEMs were evaluated for atmospheric pressure effect using a proposed mathematical model. The results of the AP effect on the DEM at 100 m, 150 m, 200 m, 250 m, 350 m, 400 m, and 500 m altitudes produced 0.072 m, 0.05 m, 0.014 m, 0.01m, 0.004 m, 0.003 m, and 0.002 m, respectively. The results were verified using the height of established GCPs and corresponding points on the DEMs. The verification process provides RMSE of 0.03 m, 0.05 m, 0.07 m, 0.1 m, 0.13 m, 0.14 m, and 0.16 m, respectively. The results show that the DEM produced at an altitude of 100 m ... |
| Τύπος εγγράφου: | thesis |
| Περιγραφή αρχείου: | text |
| Γλώσσα: | English |
| Relation: | http://psasir.upm.edu.my/id/eprint/85496/1/FK%202020%2049%20ir.pdf; Isola, Ajibola Ismaila (2020) Fusion model of unmanned aerial vehicle-based digital elevation model for accuracy improvement mapping. Doctoral thesis, Universiti Putra Malaysia. |
| Διαθεσιμότητα: | http://psasir.upm.edu.my/id/eprint/85496/ http://psasir.upm.edu.my/id/eprint/85496/1/FK%202020%2049%20ir.pdf |
| Αριθμός Καταχώρησης: | edsbas.449AA553 |
| Βάση Δεδομένων: | BASE |
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