Geospatial Information Construction and Usability Evaluation Using Nadir Image and Oblique Image
Joon Kyu Park, Keun-Wang Lee · Sensors and Materials · 2022
Recently, spatial information construction using drones has been employed in various fields such as aerial photogrammetry and ortho image production.Various types of drones for spatial information construction, such as fixed wing, rotary wing, and vertical takeoff and landing (VTOL) types, are being produced, and the field of application of drone photogrammetry is expanding as a result of intensive research.However, research on the construction and analysis of spatial information using oblique images is insufficient.In this study, geospatial information was constructed using a nadir image and an oblique image, and the utility of the oblique image was demonstrated through analysis.Accuracy was evaluated by comparing the accuracy of the ortho images obtained using the nadir image and oblique image with the Virtual Reference Station (VRS) survey result.As a result, accuracies of -0.024-0.017and -0.023-0.031cm were shown for the nadir image and oblique image, respectively, and the same accuracy as for the ground sample distance was confirmed.These results indicate that geospatial information constructed using oblique images can be employed for surveying, similarly to the results obtained using existing nadir images.Through additional research, it was possible to effectively perform 3D modeling of buildings using oblique images.The construction of geospatial information using an oblique image will be an effective way to create more realistic data.