Integrating multimedia documents and time‐evolving 3D city models for web visualization and navigation

Abstract

Many geographic features such as 3D city models, real‐time sensor data and multimedia documents (photo, audio, video, etc.) are nowadays available for describing urban areas. These heterogeneous geographic features are multidimensional (spatial, thematic and temporal), can have multiple representations (text, iconography, etc.) and can be modeled using diverse formats. Browsing and crossing these features can help us to analyze and understand the past and present and plan the future evolution of cities. Furthermore, doing so in a web context allows us to share and enrich them in a collective way. In this article we propose a new generic model (GenLinkable) for integrating such features. We also propose the Gen4DCity‐Doc model which specifies GenLinkable to integrate multimedia documents and time‐evolving 3D city models for web visualization and navigation. Gen4DCity‐Doc extends previous research results by integrating new resources describing cities (multimedia documents). Gen4DCity‐Doc is implemented in a web prototype based on a four‐tier architecture using and enhancing open source software and standards. Finally, we also demonstrate that these models open up new navigation possibilities in 3D city models and in multimedia documents through a 3D web interface, which is a current challenge, especially to help researchers in urban history.

UD‐SV: Urban data services and visualization framework for sharing multidisciplinary research

“…Finally, we ensure the reproducibility of UD-SV experiments and demonstrations (Jaillot et al, 2021) 2.…”

“…With UD-SV, our goal is to go beyond the classical dimensions of the urban model, that is, its geometry and show other information like the semantic information of city objects, the hierarchy between objects, etc. We designed the following forms of access to multimedia documents (Jaillot et al, 2021) (Figure 4):…”

Integrating Multimedia Documents in 3d City Models for a Better Understanding of Territories

“…Many tools exist to navigate in a virtual urban environment (Bleisch and Dykes, 2015, Boutsi et al, 2019, Jaillot et al, 2021. Thanks to the navigation in the scene, users can visualize a city or any 3D geometry under different angles.…”

“…Enhancing 3D scenes with multimedia documents have been used to show the evolution of a city through time (Jaillot et al, 2021, Chagnaud et al, 2016. Such documents can bring information about the state of a city at a certain date through images of buildings at different times or their chronology.…”

À quoi rêvent les maquettes ? Maquette augmentée et médiation urbaine, un défi pluridisciplinaire

“…En complément, l'enrichissement de la donnée peut mettre en oeuvre des mécanismes prédictifs en couplant des méthodes d'intelligence artificielle à des données massives pour documenter les territoires. Cette démultiplication des données s'accompagne de nouveaux outils de data visualisation [3] pour « donner à voir » des phénomènes ou des mécanismes aux dynamiques parfois complexes, et expliciter les liens entre les objets décrivant le territoire [4]. La maquette peut devenir alors un véritable support agrégatif, central et cognitif permettant l'explicitation des territoires en évolution.…”