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检索条件"丛书名=Lecture Notes in Geoinformation and Cartography"

共 1042 条记录，以下是41-50 订阅

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A Level of As-Is Detail Concept for Digital Twins of Roads-A Case Study

A Level of As-Is Detail Concept for Digital Twins of Roads-A...

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18th International 3D GeoInfo Conference

作者： Crampen, David Hein, Marcel Blankenbach, Joerg Rhein Westfal TH Aachen Geodet Inst Mies Van Der Rohe Str 1 D-52074 Aachen Germany Rhein Westfal TH Aachen Chair Comp Civil Engn & GIS Mies Van Der Rohe Str 1 D-52074 Aachen Germany

ISBN: (纸本)9783031437014;9783031436994;9783031436987

The recent rapid rise in the demand for digital methods for planning and management of road infrastructure has led to the development of new concepts for structuring the targeted applications where digital methods shall be applied in the future to improve overall efficiency. This transition towards digital planning, maintenance and even coupling digital representations with the asset in the realworld requires a clear structure so that existing potential can be optimally exploited. In this paper, we conduct a case study to test and improve our proposed LOADt concept for the digital representation of roads for the use in digital twins. Since digital planning is just emerging in road construction, the road infrastructure sector currently faces the issue of existing roads not having a digital representation. Therefore, this contribution aims at highlighting the path from reality capturing towards the establishment of the digital representation as-is of existing roads.

关键词： Road infrastructure Digital twin Level of detail

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Dynamic Digital Twins: Challenges, Perspectives and Practical Implementation from a City's Perspective

Dynamic Digital Twins: Challenges, Perspectives and Practica...

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18th International 3D GeoInfo Conference

作者： Richter, Rico Knospe, Frank Trapp, Matthias Doellner, Jurgen Univ Potsdam Digital Engn Fac Potsdam Germany Amt Geoinformat Vermessung & Kataster Lindenallee 10 D-45127 Essen Germany Univ Potsdam Hasso Plattner Inst Digital Engn Fac Potsdam Germany

ISBN: (纸本)9783031437014;9783031436994;9783031436987

Digital twins that serve as virtual representations of real-world objects and structures, are used in various applications for urban environments. Challenges for creating and maintaining digital twins involve data acquisition, fusion of heterogeneous data types, AI-based data analysis, and the integration into existing applications and workflows. In this paper, we present the concept and implementation of a dynamic digital twin from a city's perspective. The concept avoids explicit modeling to simplify the creation of a comprehensive data basis that can be easily updated frequently. 3D point clouds with semantics are used as representations for static objects and structures, such as buildings, infrastructure and subsurface structures. Dynamic aspects are represented through a time series of sensor data to enable real-time monitoring and change detection applications. A centralized data repository for applications, such as infrastructure monitoring, condition assessment, and inventory management represent a basis to support decisions. We present typical use cases and challenges from the perspective of a city and how the dynamic digital twins can create significant added value.

关键词： Digital twin Mobile mapping 3D point cloud Georadar Smart city

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Virtual Reality Experience Analysis from Point Cloud Data

Virtual Reality Experience Analysis from Point Cloud Data

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18th International 3D GeoInfo Conference

作者： Aneiros-Egido, Diego Balado, Jesus Tran, Ha Diaz-Vilarino, Lucia Univ Vigo GeoTECH CINTECX Vigo 36310 Spain Univ Melbourne Dept Infrastruct Engn Parkville Vic 3010 Australia

ISBN: (纸本)9783031437014;9783031436994;9783031436987

This study explores the implementation of point cloud visualization in virtual reality environments to evaluate immersion based on point cloud characteristics. Two visualization methods were utilized, including points and meshes, and the method was tested on point clouds from three popular datasets: Paris-Carla-3D, Toronto-3D, and Stanford 3D Indoor Scene. The point-based visualization better preserved the original point cloud's geometries and colors, but visualization through surfaces formed by points added greater realism to the experience. However, the illumination options of the points resulted in a loss of realism. Mesh visualization modified both the geometry and colors, producing models that were less realistic than those created by the point visualization. Occlusions affected the realism of all scenes, causing a loss of information and influencing the generation of erroneous illumination. Immersion was hindered by the large number of points displayed on the screen simultaneously, which significantly reduced Frames Per Second. Despite this, no problems related to Virtual Reality sickness were observed beyond a brief initial adaptation period.

关键词： LiDAR Photogrammetry Game Engines Unreal Engine Indoor environment Urban environment

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Super-Resolution of LiDAR Data Using EDSR-CBAM Neural Networks 3rd

Super-Resolution of LiDAR Data Using EDSR-CBAM Neural Networ...

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3rd International Conference on Geospatial Information Sciences (iGISc)

作者： Carlos, Hugo Moctezuma, Daniela Nava, Joaquin Ctr Geo Mexico City DF Mexico Consejo Nacl Humanidades Ciencias Tecnol CONAHCY Mexico City DF Mexico

ISBN: (纸本)9783031614422;9783031614408;9783031614392

LiDAR data is crucial for various applications, including autonomous driving. Despite the growing interest in super-resolution techniques to improve LiDAR data quality, enhancing point cloud resolution remains challenging. This paper presents a new approach to LiDAR super-resolution, employing a hybrid neural network that combines the Enhanced Deep Super-Resolution (EDSR) and Convolutional Block Attention Modules (CBAM). Through spherical projections, our method achieves notable improvements in image quality metrics like PSNR and SSIM, as well as computational efficiency. Most importantly, our EDSR-CBAM model consistently outperforms existing U-Net models.

关键词： Computational efficiency

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Automatically Evaluating the Service Quality of Bicycle Paths Based on Semantic 3D City Models

Automatically Evaluating the Service Quality of Bicycle Path...

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18th International 3D GeoInfo Conference

作者： Beil, Christof Ilic, Mario Keler, Andreas Kolbe, Thomas H. Tech Univ Munich Chair Geoinformat D-80333 Munich Germany Tech Univ Munich Chair Traff Engn & Control D-80333 Munich Germany Univ Augsburg Appl Geoinformat D-86159 Augsburg Germany

ISBN: (纸本)9783031437014;9783031436994;9783031436987

The growing demand for sustainable mobility has led to an increased focus on the development and improvement of bicycle infrastructure, especially within cities. However, evaluating the quality of existing or planned bicycle paths is a complex task mostly done manually. This paper presents a novel approach for automatically evaluating the service quality of bicycle paths using parameters derived from semantic 3D city and streetspace models compliant with the international OGC standard CityGML version 3.0. These models contain detailed 3D information with lane-level accuracy, including precise outlines of individual surfaces. This allows for accurate and high-resolution evaluations of changing bicycle path widths and slopes, as well as information on adjacent surfaces and local disturbances such as bus stops. Additionally, estimated, measured or simulated bicycle traffic volumes are considered. Based on these parameters a method for calculating the Bicycle Levels of Service (BLOS) described in a national technical regulation is adapted and implemented for a microscopic analysis. Results of this analysis are then transferred back to the original semantic 3D city objects, allowing for the attributive description of BLOS values for bicycle paths. In addition, results are visually represented by coloring corresponding bicycle path segments according to evaluation results and integrating the colored objects within aweb-based Cesium visualization of a semantic 3D city model.

关键词： Bicycle infrastructure Traffic Transportation Mobility 3D city model CityGML OpenDRIVE Bicycle level of service

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Challenges and Steps Toward Implementing 3D Cadastral Database-Physical Data Model of LADM

Challenges and Steps Toward Implementing 3D Cadastral Databa...

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18th International 3D GeoInfo Conference

作者： Shahidinejad, Javad Kalantari, Mohsen Rajabifard, Abbas Univ Melbourne Dept Infrastruct Engn Ctr Spatial Data Infrastruct & Land Adm Parkville Vic Australia UNSW Sch Civil & Environm Engn Sydney NSW Australia

ISBN: (纸本)9783031437014;9783031436994;9783031436987

The management and storage of 3D cadastral data presents significant challenges due to the complexity of the data and the need for effective storing, manipulating, retrieving, managing, querying, and analysing data. The current version of Land Administration Domain Model (LADM) is limited to a conceptual model and lacks specific guidelines for practical implementation, leading to challenges in converting it into a physical model within production systems. In addition, LADM requires specialised expertise for comprehensive understanding and implementation, hindering its user-friendliness. In addition, the literature in this field paid less attention to the principles and fundamentals of designing a 3D cadastral database. In order to address this knowledge gap, this research aims to investigate design steps for a 3D cadastral database based on LADM as well as challenges associated with the design process. The paper reviews the conceptual model of LADM and investigates converting this conceptual model to a logical model by identifying code lists as multivalued attributes, defining integrity constraints, and considering normalization. Additionally, challenges associated with designing physical models, such as defining different data types are discussed. The current study signified the importance of a well-defined database schema and proposed initial steps to achieve a robust and comprehensive 3D cadastral database. The result is based on an ongoing research project on developing a 3D cadastral database.

关键词： 3D cadastre LADM Physical data model Database management system (DBMS)

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Citizen Participation in the Management of Territorial Information 3rd

Citizen Participation in the Management of Territorial Infor...

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3rd International Conference on Geospatial Information Sciences (iGISc)

作者： Vivanco, Lorena Pacurucu-Caceres, Natalia Achig, Rosario Morocho, Villie Univ Cuenca Fac Architecture & Urbanism Av 12 Abril Cuenca Ecuador Univ Cuenca Dept Comp Sci Av Victor Albornoz & Calle Cerezos Cuenca Ecuador

ISBN: (纸本)9783031614422;9783031614408;9783031614392

For the formulation of public policies, it is indispensable that citizen participation promotes deliberation and decision-making in the management of public affairs and in particular in the processes of territorial planning. To understand the problem of territorial information management it is necessary to work on knowledge management and content management, because participation is not merely informative or consultative, it requires that citizens have the right to give their opinions, propose, and decide on what affects them in their daily lives. In the canton of Cuenca, citizen participation has been weak, among other aspects, because of the quality of information available to the actors involved in the participatory process, due to the scarcity of tools and methods that allow the incorporation of new alternatives of information and communication technologies. This article analyzes the quality of information available to citizens in the process of formulating territorial plans and the inclusion of virtual assistants as a useful tool to support citizen participation processes by generating data sources that are easy to obtain and that, by having a more personalized interface, facilitate their use, in order to make geoinformation transparent and democratize it as an input for territorial planning.

关键词： Citizen participation Information management Virtual assistants Territorial plan

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Optim3D: Efficient and Scalable Generation of Large-Scale 3D Building Models

Optim3D: Efficient and Scalable Generation of Large-Scale 3D...

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18th International 3D GeoInfo Conference

作者： Yarroudh, Anass Kharroubi, Abderrazzaq Billen, Roland Univ Liege Geomat Unit Batiment B5aAllee Six Aout 19 B-4000 Liege Belgium

ISBN: (纸本)9783031437014;9783031436994;9783031436987

3D building reconstruction in the urban environment is a key step in developing urban digital twins. So far, the existing researches focus on the modeling process and overlook the scalability issues related to the extensive data and iterative calculations. In this paper, we propose an approach for efficient and scalable 3D generation of large-scale building models from aerial LiDAR data. Our method involves data indexing and tiling for enhanced efficiency, along with parallel processing to accelerate the modeling process. We also correct ground-floor elevation inaccuracies in the final model to ensure reliable applications and analysis. The results show that, for large datasets, the indexing overcomes the memory saturation and speeds up the tiling and the reconstruction processes. The parallel processing accelerates the reconstruction process by nearly five times compared to an iterative approach. Additionally, using K-nearest neighbors instead of radius search resulted in more accurate elevation values. Our source code is available at: https://***/Yarroudh/Optim3D.

关键词： Reconstruction LiDAR Indexing Tiling Parallel processing 3D Building models

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Digital geoTwin: A CityGML-Based Data Model for the Virtual Replica of the City of Vienna

Digital geoTwin: A CityGML-Based Data Model for the Virtual ...

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18th International 3D GeoInfo Conference

作者： Lehner, Hubert Kordasch, Sara Lena Glatz, Charlotte Agugiaro, Giorgio City Vienna Dept Surveying & Mapping Muthgasse 62 A-1190 Vienna Austria Delft Univ Technol Fac Architecture & Built Environm Dept Urbanism 3D Geoinformat Grp Julianalaan 134 NL-2628BL Delft Netherlands

ISBN: (纸本)9783031437014;9783031436994;9783031436987

This paper presents a CityGML-based data model developed for the semantic 3D city model of Vienna, Austria. The data model consists in a profile of the CityGML 2.0 standard and has been extended by means of an Application Domain Extension (ADE) developed by the Department for Surveying and Mapping of the City of Vienna in order to comply with the current and future needs of the municipality. The definition and adoption of such data model are a fundamental part of Vienna's "Digital geoTwin" project. The core of the strategy is to process the 3D measurement data of the surveying and mapping department from existing as well as new measurement methods directly into a Digital geoTwin-a virtual, semantic 3D replica of all objects in the city-and to derive other geodata products (city map, elevation models, etc.) from this 3Dmodel. Furthermore, the Digital geoTwin should serve as a geometric and semantic basis for a digital twin of the City of Vienna. In order to define the data model for the Digital geoTwin, 3D modelling of all city objects has been carried out in a test area of the city, followed by a mapping of the objects to the CityGML data model. In an iterative development process, conceptual gaps have been identified, analysed and eventually formalized into a UML-based Application Domain Extension. Additionally, the free and open-source CityGML 3D City Database (3DCityDB) has been used for storage after being extended accordingly, and FME workbenches have been created to transform and import the original source data into the 3DCityDB and therefore test the suitability of the developed data model.

关键词： Digital geoTwin Urban digital twin Data modelling 3D city model CityGML ADE

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How to Integrate AI into Spatial Data Infrastructures: Evolution of the UCuenca SDI 3rd

How to Integrate AI into Spatial Data Infrastructures: Evolu...

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3rd International Conference on Geospatial Information Sciences (iGISc)

作者： Morocho, Villie Pacurucu-Caceres, Natalia Vivanco, Lorena Santander, Fabian Bustamante, Juan Achig, Rosario Univ Cuenca Dept Comp Sci Cuenca Ecuador Univ Cuenca Fac Architecture & Urban Planning Cuenca Ecuador

ISBN: (纸本)9783031614422;9783031614408;9783031614392

The diffusion of great advances in Artificial Intelligence has managed to awaken interest in various lines of research and seek new ways for other fields of technology, seeking to make the most of these advances. Several of them have begun to become part of people's daily lives and there is no doubt that virtual assistants play a major role. Whether by the deployment of mobile devices for any user regardless of age, economic or social situation, it is common to have a computer. On the other hand, problems have been identified for citizen participation in territorial planning, and it is essential to seek forms of support in technology so that the use of these devices are not only for basic chat tasks but begin to be part of an intelligent citizen. In this context, Spatial Data Infrastructures need to evolve and take advantage of forms of AI to improve usability. This paper presents how the UCuenca SDI has evolved to integrate AI and the whole process that was necessary to develop a Virtual Assistant in a specific domain. It describes all the necessary steps that can be applied and that allow to continue growing the knowledge so that the use of AI allows a citizen to access geospatial information in an easy way. This contributes to the creation of working lines for smart cities, allowing the GADs to provide their citizens with adequate and more relevant information.

关键词： Spatial data infrastructure Virtual assistant Territorial planning AI

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