61,474 research outputs found
Three-dimensional urban models in complex rural environments. Proposal for automation in the historical centre of Cehegín.
Urban modelling processes are the basis for the
management of Smart Cities. Automated workflows
are typically used to model large portions
of cities with homogeneous urban fabrics. These
processes result in very simple three-dimensional
models with large discrepancies with reality.
However, the case of the historic centres of small
cities is different due to the complexity of their
urban fabric and the heterogeneity of their buildings.
This paper proposes a semi-automatic supervised
modelling workflow that allows the elaboration
of complex urban fabric models following the
CityGML standard and its levels of detail. The
case study focuses on the historic centre of Cehegín
(Spain).
The advantage of this methodology is the use
of downloadable data from public SDIs such as
the Digital Cadastre (cadastral polygons) and
the National Geographic Institute (LiDAR point
Keywords:
3D Urban Model; Historical centre; CityGML;
LiDAR; GIS
Pedro Miguel Jimenez-
Vicario
PhD. Architect. Associate
Professor at the School of
Architecture of the Technical
University of Cartagena.
Department of Architecture
and Building Technology.
Researcher at GRAMMAR.
Cartagena. Spain.
clouds with an approximate density of 0.5 pts/
m2). These data are geolocated and processed in
GIS, and exported to Rhinoceros-Grasshopper3d
where modelling algorithms are implemented for
each level of detail, supported by statistical filters
and automatic classifiers.
This results in richer and more accurate models
than those obtained with automatic modellers
and can be used for different applications in the
field of management and simulation
Parametric Surfaces for Augmented Architecture representation
Augmented Reality (AR) represents a growing communication channel, responding to the need to expand reality with additional information, offering easy and engaging access to digital data. AR for architectural representation allows a simple interaction with 3D models, facilitating spatial understanding of complex volumes and topological relationships between parts, overcoming some limitations related to Virtual Reality. In the last decade different developments in the pipeline process have seen a significant advancement in technological and algorithmic aspects, paying less attention to 3D modeling generation. For this, the article explores the construction of basic geometries for 3D model’s generation, highlighting the relationship between geometry and topology, basic for a consistent normal distribution. Moreover, a critical evaluation about corrective paths of existing 3D models is presented, analysing a complex architectural case study, the virtual model of Villa del Verginese, an emblematic example for topological emerged problems. The final aim of the paper is to refocus attention on 3D model construction, suggesting some "good practices" useful for preventing, minimizing or correcting topological problems, extending the accessibility of AR to people engaged in architectural representation
A virtual environment for the design and simulated construction of prefabricated buildings
The construction industry has acknowledged that its current working practices are in need of substantial improvements in quality and efficiency and has identified that computer modelling techniques and the use of prefabricated components can help reduce times, costs, and minimise defects and problems of on-site construction. This paper describes a virtual environment to support the design and construction processes of buildings from prefabricated components and the simulation of their construction sequence according to a project schedule. The design environment can import a library of 3-D models of prefabricated modules that can be used to interactively design a building. Using Microsoft Project, the construction schedule of the designed building can be altered, with this information feeding back to the construction simulation environment. Within this environment the order of construction can be visualised using virtual machines. Novel aspects of the system are that it provides a single 3-D environment where the user can construct their design with minimal user interaction through automatic constraint recognition and view the real-time simulation of the construction process within the environment. This takes this area of research a step forward from other systems that only allow the planner to view the construction at certain stages, and do not provide an animated view of the construction process
Digital technologies for virtual recomposition : the case study of Serpotta stuccoes
The matter that lies beneath the smooth
and shining surface of stuccoes of the Serpotta family, who used to work in Sicily from 1670 to 1730, has
been thoroughly studied in previous papers, disclosing
the deep, even if empirical, knowledge of materials science that guided the artists in creating their master-
works. In this work the attention is focused on the solid
perspective and on the scenographic sculpture by Giacomo Serpotta, who is acknowledged as the leading exponent of the School. The study deals with some particular works of the artist, the so-called "teatrini" (Toy
Theater), made by him for the San Lorenzo Oratory in
Palermo. On the basis of archive documents and previous analogical photogrammetric plotting, integrated
with digital solutions and methodologies of computer-
based technologies, the study investigates and interprets
the geometric-formal genesis of the examined works of
art, until the prototyping of the whole scenic apparatus.peer-reviewe
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Model-based groupware solution for distributed real-time collaborative 4D planning via teamwork
Construction planning plays a fundamental role in construction project management that requires team working among planners from a diverse range of disciplines and in geographically dispersed working situations. Model-based four-dimensional (4D) computer-aided design (CAD) groupware, though considered a possible approach to supporting collaborative planning, is still short of effective collaborative mechanisms for teamwork due to methodological, technological and social challenges. Targeting this problem, this paper proposes a model-based groupware solution to enable a group of multidisciplinary planners to perform real-time collaborative 4D planning across the Internet. In the light of the interactive definition method, and its computer-supported collaborative work (CSCW) design analysis, the paper discusses the realization of interactive collaborative mechanisms from software architecture, application mode, and data exchange protocol. These mechanisms have been integrated into a groupware solution, which was validated by a planning team in a truly geographically dispersed condition. Analysis of the validation results revealed that the proposed solution is feasible for real-time collaborative 4D planning to gain a robust construction plan through collaborative teamwork. The realization of this solution triggers further considerations about its enhancement for wider
groupware applications
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