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What is 3d Models

Chapter 14
Methods and Applications of Geospatial Technology in Sustainable Urbanism
Representation of objects based on its position x, y (2D) and z (height).
Published in Chapter:
Three-Dimensional Modelling for Cultural Heritage
Luis Marques (CICS.NOVA, Universidade NOVA de Lisboa, Portugal & CPSV, Technical University of Catalonia, Spain) and Josep Roca (Technical University of Catalonia (CPSV), Spain, Spain)
Copyright: © 2021 |Pages: 26
DOI: 10.4018/978-1-7998-2249-3.ch014
Abstract
The creation of 3D models of urban elements is extremely relevant for urbanists constituting digital archives and being especially useful for enriching maps and databases or reconstructing and analyzing objects/areas through time, building/recreating scenarios and implementing intuitive methods of interaction. The widespread data available online offer new opportunities to generate realistic 3D models without the need to go physically to the place. This chapter aims to demonstrate the potential 3D modeling and visualization/interaction of urban elements in the city for multiple purposes, and it is organized in four main topics: The first deals with the theoretical framework regarding the bases of the human perception of the spatial environment and the importance of 3D modelling. The second and third deal with technical procedures on terrestrial/aerial data acquisition and demonstrate alternatively data gathered online to generate 3D models for the visualization of urban elements of the city, and the fourth introduces 3D model visualization within an augmented reality environment.
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Chapter 3
3D Digitization of Architectural Heritage: Habana Vieja in Cuba – Approaching H-BIM
Communication tool for the understanding and support of the object based on three-dimensional representation of a real object in a virtual space. Depending on the objective for which they are created, two types of model can be made: figurative 3d models and 3d models for scientific purposes. The figurative 3d models are aimed at achieving a convincing documentation of reality with a purely informative purpose; they are characterized by the identification of the geometry that describes the object represented by the clear and readability of its component parts. The 3d models for scientific purposes have a higher dimensional and formal correspondence with the real object and are characterized by high accuracy and reliability of the dimensions represented. In the first case, any survey's methodology is able to obtain data necessary for a correct realization of the final model, while in the second one needs to have qualitative accurate and highly precise survey data.
Published in Chapter: 3D Digitization of Architectural Heritage: Habana Vieja in Cuba – Approaching H-BIM; From: Analysis, Conservation, and Restoration of Tangible and Intangible Cultural Heritage
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Chapter 20
Design of a Web3D Serious Game for Human Anatomy Education: A Web3D Game for Human Anatomy Education
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Chapter 6
Built and Destroyed Memory: Where Does Methodology Lead?
A 3D element created either using discretization (survey) or virtual construction (design). It can either be material (plastic, 3D print) or immaterial (virtual model). In the latter case the 3D Model is linked to the use and characteristics of modelers, software that makes it possible to interact with an initially empty digital environment enabling the operator to build elements that step by step reproduce the model once they are assembled. Direct correspondence is thus established between physical and virtual space: each material point Pr, identified thanks to its coordinates xr, yr, zr in real space, immediately finds its virtual equivalent Pv, also identified by a univocal trio of Cartesian coordinates xv, yv, zv. 3D model is conventionally an important communicative tool to help understand the represented object.
Published in Chapter: Built and Destroyed Memory: Where Does Methodology Lead?; From: Conservation, Restoration, and Analysis of Architectural and Archaeological Heritage
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Chapter 2
The Surveying and Representation Process Applied to Architecture: Non-Contact Methods for the Documentation of Cultural Heritage
Communication tool for the understanding and support of the object based on three-dimensional representation of a real object in a virtual space. Depending on the objective for which they are created, two types of model can be made: figurative 3d models and 3d models for scientific purposes. The figurative 3d models are aimed at achieving a convincing documentation of reality with a purely informative purpose; they are characterized by the identification of the geometry that describes the object represented by the clear and readability of its component parts. The 3d models for scientific purposes have a higher dimensional and formal correspondence with the real object and are characterized by high accuracy and reliability of the dimensions represented. In the first case, any survey's methodology is able to obtain data necessary for a correct realization of the final model, while in the second one needs to have qualitative accurate and highly precise survey data.
Published in Chapter: The Surveying and Representation Process Applied to Architecture: Non-Contact Methods for the Documentation of Cultural Heritage; From: Handbook of Research on Emerging Digital Tools for Architectural Surveying, Modeling, and Representation
Full Text Chapter Download: US $37.50 Add to Cart
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