3D Visualization of Urban Data Based on CityGML with WebGL

Gesquière, Gilles; Manin, Alexis

doi:10.4018/978-1-4666-3994-2.ch070

Cited by 5 publications

(5 citation statements)

References 6 publications

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“…Based on OpenGL ES 2.0, WebGL uses the OpenGL shading language, GLSL, and offers the familiarity of the standard OpenGL API used to create 3D graphics in a Web browser [11]. ThreeJS is one of the famous 3D graphics libraries based on javascript, has been used to support WebGL (Web Graphic Library) [12].…”

Section: Video and Panoramic Seamless Connecting Methodsmentioning

confidence: 99%

A WebGL-based 3D virtual home roaming by seamlessly connecting videos to panoramas

Tao

Wang

2015

2015 8th International Congress on Image and Signal Processing (CISP)

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In virtual 3d websites, the traditional 3D real-time rendering virtual roaming is difficult to achieve a realistic rendering effect. While ordinary panoramic roaming has the problem of visual disconnection on switching scene. To solve these problems, this paper proposes a WebGL-based virtual roaming method which can seamlessly connect video to panoramic view. Firstly, we convert the video initial position's texture coordinates to angle values, and compute turning degree according to the actual click position in the scene, and then, camera view roams to video's initial position. Secondly, the display content switches to the video player smoothly. During the video is playing, the camera view rotates to the video's end position. Finally, the content switches back to the panoramas after the video is over, and we make sure that the end video frame matches with the current perspective view. Experiments show that this method has fluency and a strong sense of reality. It's better to meet the requirements of virtual home roaming.

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Section: Video and Panoramic Seamless Connecting Methodsmentioning

confidence: 99%

A WebGL-based 3D virtual home roaming by seamlessly connecting videos to panoramas

Tao

Wang

2015

2015 8th International Congress on Image and Signal Processing (CISP)

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“…Visualisation of 3D Geo-Information/3D City Models/3D Buildings has been a very active research topic in last 10 years. Some recent studies in the field include, Gesquière and Manin (2012) who presented an architecture for 3D visualisation of CityGML objects by using the WebGL modelling language. Jochem and Goetz (2012) presented a method to transform the crowdsourced OpenStreetMap data into a 3D city model.…”

Section: Visualisation Of 3d and Time-varying Geo-informationmentioning

confidence: 99%

Web Based 3d Visualisation of Time-Varying Air Quality Information

Işıkdağ

Sahin

2018

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

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<p><strong>Abstract.</strong> Many countries where the industrial development and production rates are high face many side effects of low air quality and air pollution. There is an evident correlation between the topographic and climatic properties of a location and the air pollution and air quality on that location. As the variation of air quality is dependent on location, air quality information should be acquired, utilised, stored and presented in form of Geo-Information. On the other hand, as this information is related with the health concerns of public, the information should be available publicly, and needs to be presented through an easily accessible medium and through a commonly used interface. Efficient storage of time-varying air quality information when combined with an efficient mechanism of 3D web-based visualisation would help very much in dissemination of air quality information to public. This research is focused on web-based 3D visualisation of time-varying air quality data. A web based interactive system is developed to visualise pollutant levels that were acquired as hourly intervals from more than 100 stations in Turkey between years 2008 and 2017. The research also concentrated on visualisation of geospatial high volume data. In the system, visualisation can be achieved on-demand by querying an air pollutant information database of 10.330.629 records and a city object database with more than 700.000 records. The paper elaborates on the details of this research. Following a background on air quality, air quality models, and Geo-Information visualisation, the system architecture and functionality is presented. The paper concludes with results of usability tests of the system.</p>

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“…A set of web standards and formats (e.g., WebGL, X3D, X3DOM) tackle the demand for plugin-free 3D rendering in web browsers and form the basis of several approaches and solutions in this field (Prieto and Izkara, 2012, Gesquire, 2012, Christen et al, 2012. These approaches utilize transferred 3D geometry and textures for rendering.…”

Section: Foundations and Related Workmentioning

confidence: 99%

Scalable Multi-Platform Distribution of Spatial 3D Contents

Klimke

Hagedorn

Döllner

2014

International Journal of 3-D Information Modeling

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Virtual 3D city models provide powerful user interfaces for communication of 2D and 3D geoinformation. Providing high quality visualization of massive 3D geoinformation in a scalable, fast, and cost efficient manner is still a challenging task. Especially for mobile and web-based system environments, software and hardware configurations of target systems differ significantly. This makes it hard to provide fast, visually appealing renderings of 3D data throughout a variety of platforms and devices. Current mobile or web-based solutions for 3D visualization usually require raw 3D scene data such as triangle meshes together with textures delivered from server to client, what makes them strongly limited in terms of size and complexity of the models they can handle. This paper introduces a new approach for provisioning of massive, virtual 3D city models on different platforms namely web browsers, smartphones or tablets, by means of an interactive map assembled from artificial oblique image tiles. The key concept is to synthesize such images of a virtual 3D city model by a 3D rendering service in a preprocessing step. This service encapsulates model handling and 3D rendering techniques for high quality visualization of massive 3D models. By generating image tiles using this service, the 3D rendering process is shifted from the client side, which provides major advantages: (a) The complexity of the 3D city model data is decoupled from data transfer complexity (b) the implementation of client applications is simplified significantly as 3D rendering is encapsulated on server side (c) 3D city models can be easily deployed for and used by a large number of concurrent users, leading to a high degree of scalability of the overall approach. All core 3D rendering techniques are performed on a dedicated 3D rendering server, and thin-client applications can be compactly implemented for various devices and platforms.

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3D Visualization of Urban Data Based on CityGML with WebGL

Cited by 5 publications

References 6 publications

A WebGL-based 3D virtual home roaming by seamlessly connecting videos to panoramas

A WebGL-based 3D virtual home roaming by seamlessly connecting videos to panoramas

Web Based 3d Visualisation of Time-Varying Air Quality Information

Scalable Multi-Platform Distribution of Spatial 3D Contents

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