![]() We develop the reconstruction of 3D building models from a single street view image using image-to-mesh reconstruction techniques modified from the CV domain. Traditional approaches that can use SVI for reconstruction require multiple images, while in practice, often only few street-level images provide an unobstructed view of a building. In parallel, street view imagery (SVI) has been gaining currency, driven by the rapid expansion in coverage and advances in computer vision (CV), but it has not been used much for generating 3D city models. their footprints) and data such as point clouds, which are scarce and laborious to acquire, limiting their expansion. Approaches to reconstruct 3D building models often require existing building information (e.g. The results are presented on the case study of campus area of the University of Novi Sad.ģD building models are an established instance of geospatial information in the built environment, but their acquisition remains complex and topical. It this paper, we present workflow that goes from data collection by LiDAR, through extract, transform, load (ETL) transformations and data processing to developing 3D virtual city model and finally discuss its future potential usage scenarios in various fields of application such as modern ICT-based urban planning and 3D cadaster. The goal of this research is to develop virtual 3D city model based on airborne LiDAR surveying and to analyze its applicability toward Smart Cities applications. The collected data is further processed to obtain fully developed photorealistic virtual 3D city models. One of the methods for collecting data that can be used for developing such 3D city models is Light Detection and Ranging (LiDAR), a technology that has provided opportunities to generate large-scale 3D city models at relatively low cost. In this context, 2D and 3D spatial data play a key role, in particular 3D city models. In order to do this, the modelling of the city should cover all aspects of the city that are relevant to the problems that require smart solutions. ![]() We return on September 17-18, 2022.The Smart Cities data and applications need to replicate, as faithfully as possible, the state of the city and to simulate possible alternative futures. We come back twice a year to make the best ham radio educational event. ![]() The Covid-19 Pandemic has made this all the more important.įour QSO Today Virtual Ham Expo have been produced over the last two years. Sixty percent of the 15,000 attendees, almost 9000 hams do not go to live expos, preferring to stay at home. We discovered something unique in August 2020, from surveys that we made following the expo. Over 80 presentations were made, with live Q&A on Zoom webinar, and attendees could come back over a 30 day on-demand period to view the recorded presentations that they missed. The First QSO Today Virtual Ham Expo was in August 2020 where over 15,000 amateurs attended on the Expo weekend, attending on their computers over the Internet instead of in-person. It was because of these closures that Eric, 4Z1UG, got the idea to create an on-line, and virtual convention that has all of the elements of a real ham radio convention, similar to the most notable live conventions. The Covid-19 Pandemic closed ham radio conventions, hamfests, and monthly meetings all across the World in 2020. It is exactly this midway that the "Expo" was founded to explore. However, amateur radio now has a "midway of a thousand smaller tents" according to Eric Guth, 4Z1UG, founder of the QSO Today Virtual Ham Expo, and host of the QSO Today Podcast, a interview program featuring the most interesting amateur radio operators. In those rings could be Contesting, DXing, and Rag Chewing. It has its main tent with three rings in the center.
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