Published in Scientific Papers. Series E. Land Reclamation, Earth Observation & Surveying, Environmental Engineering, Vol. VIII
Written by Gabriel POPESCU, Octavian Laurentiu BALOTA, Daniela IORDAN, Daniel ILIE
The paper aimed to present the advantages of realistic representation of a geographic area by combining optical and LiDAR data captured with UAVs. LiDAR data and aerial images, both captured with an UAV, have their own unique advantages and disadvantages and it is natural to integrate those two data sets for a good realistic representation of a geographic area in terms of horizontal and vertical accuracy. Compared with aerial images, LIDAR data provide more accurate height information but less accurate boundaries. Aerial images provide more extensive planimetric information such as high-resolution texture and colour information. Although 3D height information can be estimated from one or several images by the use of several photogrammetric methods, the height information extracted from aerial images is still relatively less accurate. The realistic representation of a geographic area in the virtual environment, was verified for validation in the Cernica Dam area, checking the spatial data sets used (LiDAR and optical). We used for data validation, the ground truth, given by GNSS measurements in the field, and the experimental results indicate that this combination improves the overall accuracy from 94% to 97%.
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