Accuracy Assessment of Low Cost UAV Based City Modelling for Urban Planning

This paper presents an Unmanned Aerial Vehicles (UAV) based 3D city modelling approach to be used in managing and planning urban areas. While the urban growth is rapidly increasing in many places of the world, the conventional techniques do not respond to the changing environment simultaneously. For effective planning, high-resolution remote sensing is a tool for the production of 3D digital city models. In this study, it is aimed at designing the remote sensing by UAV through urban terrain. Using all the information produced from UAV imagery, high-accurate 3D city models are obtained. The analysis of XYZ data of the derived from 3D model using UAV photogrammetry revealed similar products as the terrestrial surveys which are commonly used for the last development plans and city maps. The experimental results show the effectiveness of the UAV-based 3D city modelling. The assessed accuracy of the UAV photogrammetry proved that urban planners can use it as the main tool of data collection for boundary mapping, changes monitoring and topographical surveying instead of GPS/GNSS surveying

UAV for 3D Morphological Mapping Applications: A Case Study of Koru Mining Site, Canakkale, NW Turkey

The use of UAV has steadily increased over the past decade, and it has been seen as a standard research tool for obtaining images and other information on demand. Nowadays, UAV platforms are a valuable source of data for inspection, surveillance, mapping and 3D modelling problems for earth sciences, especially in all engineering and technical fields. New applications have been introduced for the short-and close-range domain in mining sites, UAVs are a low-cost alternative to classical manned aerial photogrammetry to generate detailed 3D models and orthophoto. In this paper, a workflow of UAV photogrammetry with the use of a widely accessible digital camera was employed, for 3D reconstruction and feature extraction of a mining site. In addition, a detailed accuracy assessment for the products using low-cost UAV was performed for 3D morphological modelling and feature extraction. The obtained results are illustrated in detail on the examples. Their comparison with the results of the conventional surveying systems was provided