scholarly journals CITYGML APPLICATION DOMAIN EXTENSION FOR 3D STRATA REPRESENTATIONS IN THE SMARTKADASTER SYSTEM: TOWARDS BEYOND CADASTRE PURPOSE IN MALAYSIA

2021 ◽  
Vol VIII-4/W2-2021 ◽  
pp. 99-103
Author(s):  
C. B. Siew ◽  
N. Z. Abdul Halim ◽  
H. Karim ◽  
M. A. Mohd Zain ◽  
K. S. Looi
Keyword(s):  
Spatial Data ◽  
Application Domain ◽  
Kuala Lumpur ◽  
Levels Of Detail ◽  
Emerging Trends ◽  
Digital Twins ◽  
Domain Extension ◽  
Data Output ◽  
3D City Modelling ◽  
City Models

Abstract. Recent advancements in 3D city modelling and emerging trends in implementing and realising Digital Twins motivate the Department of Survey and Mapping Malaysia (JUPEM) to develop and implement SmartKADASTER (SKiP) Phase 2. SmartKADASTER Phase I was a precursor to this system, and it primarily focused on applying two-dimensional (2D) spatial data for 3D spatial analysis. CityGML was used as the data model for various Levels of Detail (LoD) in this new initiative to represent city models across the Greater Kuala Lumpur region. SmartKADASTER however, lacks strata information. Therefore, to integrate strata information into the SKiP citymodel environment, an Application Domain Extension (ADE) for CityGML has been developed to convert existing Strata XML to StrataGML, a CityGML-compliant data output format. This paper describes the purpose of the SmartKADASTER initiative in Section 1. Section 2 explains additional context for the initiative as well as some backgrounds. Section 3 discusses the conversion workflow and ADE definitions, followed by a brief discussion of visualisation in Section 4 and a project summary in Section 5.

scholarly journals Implementation of SExI–FS (Spatially Explicit Individual-based Forest Simulator) Model using UAV Aerial Photo Data Case Study: Jatinangor ITB Campus

2020 ◽  
Vol 27 (4) ◽  
pp. 314
Author(s):  
Aminah Kastuari ◽  
Deni Suwardhi ◽  
Himasari Hanan ◽  
Ketut Wikantika ◽  
Agung Budi Harto ◽  
...  
Keyword(s):  
Spatial Data ◽  
Landscape Architecture ◽  
Dynamic Changes ◽  
Dynamic Data ◽  
Vegetation Growth ◽  
Existing Structure ◽  
3D City Modelling ◽  
Initial Research ◽  
City Models

Landscape architecture affected by interaction between built and natural environment such as vegetation. Nowadays, landscape architects are using 3D city models for simulations, which requires highly dynamic and time-varying attributes. 3D city modelling structure has been standardized by CityGML, although researches that are related to the storing of dynamic data had been conducted for the past years, it has not been supported by any standard until this very moment. In dynamizer, it is added as a data structure into a CityGML structure that is already existed, although the existing structure is a static one. Kolbe’s research on dynamic data using CityGML called dynamizer could use the spatial data in more dynamic way by changing its geometric, thematic, or appearance data, but its purpose is not specific for trees or vegetation. In this paper, a method of simulating the vegetation growth using SeXI-FS will be discussed to show the dynamic changes that happen in vegetation as part of the dynamic changes in landscape architecture. The result of this research will be used to address the importance of information on vegetation by studying its changes in Jatinangor ITB Campus and as initial research to build dynamizer in CityGML for landscape architecture.

An Energy-Related CityGML ADE and Its Application for Heating Demand Calculation

2015 ◽  
Vol 4 (3) ◽  
pp. 59-77 ◽  
Author(s):  
Marcel Bruse ◽  
Romain Nouvel ◽  
Parag Wate ◽  
Volker Kraut ◽  
Volker Coors
Keyword(s):  
Energy Demand ◽  
Building Energy ◽  
Data Sets ◽  
Application Domain ◽  
Data Formats ◽  
Building Energy Systems ◽  
Domain Extension ◽  
Energy Simulations ◽  
Heating Energy Demand ◽  
City Models

Different associated properties of city models like building geometries, building energy systems, building end uses, and building occupant behavior are usually saved in different data formats and are obtained from different data sources. Experience has shown that the integration of these data sets for the purpose of energy simulation on city scale is often cumbersome and error prone. A new application domain extension for CityGML has been developed in order to integrate energy-related figures of buildings, thermal volumes, and facades with their geometric descriptions. These energy-related figures can be parameters or results of energy simulations. The applicability of the new application domain extension has been demonstrated for heating energy demand calculation.

scholarly journals EXPLORING THE IMPACT OF VISUAL COMPLEXITY LEVELS IN 3D CITY MODELS ON THE ACCURACY OF INDIVIDUALS’ ORIENTATION AND COGNITIVE MAPS

2015 ◽  
Vol II-3/W5 ◽  
pp. 499-506 ◽  
Author(s):  
V. Rautenbach ◽  
A. Çöltekin ◽  
S. Coetzee
Keyword(s):  
Negative Impact ◽  
Visual Complexity ◽  
Cognitive Maps ◽  
Answer Sheet ◽  
Development Planning ◽  
Mental Maps ◽  
3D City Models ◽  
Levels Of Detail ◽  
The Impact ◽  
City Models

In this paper we report results from a qualitative user experiment (n=107) designed to contribute to understanding the impact of various levels of complexity (mainly based on levels of detail, i.e., LoD) in 3D city models, specifically on the participants’ orientation and cognitive (mental) maps. The experiment consisted of a number of tasks motivated by spatial cognition theory where participants (among other things) were given orientation tasks, and in one case also produced sketches of a path they ‘travelled’ in a virtual environment. The experiments were conducted in groups, where individuals provided responses on an answer sheet. The preliminary results based on descriptive statistics and qualitative sketch analyses suggest that very little information (i.e., a low LoD model of a smaller area) might have a negative impact on the accuracy of cognitive maps constructed based on a virtual experience. Building an accurate cognitive map is an inherently desired effect of the visualizations in planning tasks, thus the findings are important for understanding how to develop better-suited 3D visualizations such as 3D city models. In this study, we specifically discuss the suitability of different levels of visual complexity for development planning (urban planning), one of the domains where 3D city models are most relevant.

scholarly journals MODELLING CHANGES, STAKEHOLDERS AND THEIR RELATIONS IN SEMANTIC 3D CITY MODELS

2021 ◽  
Vol VIII-4/W2-2021 ◽  
pp. 137-144
Author(s):  
S. H. Nguyen ◽  
T. H. Kolbe
Keyword(s):  
Change Detection ◽  
Smart Cities ◽  
Deep Understanding ◽  
Structural Level ◽  
Mathematical Methods ◽  
Conceptual Approach ◽  
3D City Models ◽  
Digital Twins ◽  
Virtual City ◽  
City Models

Abstract. Urban digital twins have been increasingly adopted by cities worldwide. Digital twins, especially semantic 3D city models as key components, have quickly become a crucial platform for urban monitoring, planning, analyses and visualization. However, as the massive influx of data collected from cities accumulates quickly over time, one major problem arises as how to handle different temporal versions of a virtual city model. Many current city modelling deployments lack the capability for automatic and efficient change detection and often replace older city models completely with newer ones. Another crucial task is then to make sense of the detected changes to provide a deep understanding of the progresses made in the cities. Therefore, this research aims to provide a conceptual framework to better assist change detection and interpretation in virtual city models. Firstly, a detailed hierarchical model of all potential changes in semantic 3D city models is proposed. This includes appearance, semantic, geometric, topological, structural, Level of Detail (LoD), auxiliary and scoped changes. In addition, a conceptual approach to modelling most relevant stakeholders in smart cities is presented. Then, a model - reality graph is used to represent both the different groups of stakeholders and types of changes based on their relative interest and relevance. Finally, the study introduces two mathematical methods to represent the relevance relations between stakeholders and changes, namely the relevance graph and the relevance matrix.

scholarly journals INTEGRATION BETWEEN SURFACE AND SUBSURFACE SPATIAL OBJECTS FOR DEVELOPING OMAN 3D SDI BASED ON THE CITYGML STANDARD

2019 ◽  
Vol XLII-4/W16 ◽  
pp. 79-84
Author(s):  
K. Al Kalbani ◽  
A. Abdul Rahman
Keyword(s):  
Data Structure ◽  
Spatial Data ◽  
3D Model ◽  
Infrastructure Management ◽  
Data Infrastructure ◽  
3D City Models ◽  
Spatial Objects ◽  
The World ◽  
Geospatial Tools ◽  
City Models

Abstract. The paper investigates the capability to integrate the surface and subsurface 3D spatial objects data structure within the 3D spatial data infrastructure (3D SDI) based on the CityGML standards. In fact, a number of countries around the world have started applying the 3D city models for their planning and infrastructure management. While others are still working toward 3D SDI by using CityGML standards. Moreover, most of these initiatives focus on the surface spatial objects with less interest to model subsurface spatial objects. However, dealing with 3D SDI requires both surface and subsurface spatial objects with clear consideration on the issues and challenges in terms of the data structure. On the other hand, the study has used geospatial tools and databases such as FME, PostgreSQL-PostGIS, and 3D City Database to generate the 3D model and to test the capability for integrating the surface and subsurface 3D spatial objects data structure within the 3D SDI. This paper concludes by describing a framework that aims to integrate surface and subsurface 3D geospatial objects data structure in Oman SDI. The authors believe that there are possible solutions based on CityGML standards for surface and subsurface 3D spatial objects. Moreover, solving the issues in data structure can establish a better vision and open new avenues for the 3D SDI.

Spatial Data Repositories

2011 ◽  
pp. 80-112
Author(s):  
Julian Ray
Keyword(s):  
Data Storage ◽  
Spatial Data ◽  
Storage Systems ◽  
Systems Design ◽  
Successful Implementation ◽  
Security Risks ◽  
Data Repositories ◽  
Emerging Trends ◽  
Storage Technologies ◽  
Systems Architectures

This chapter identifies and discusses issues associated with integrating technologies for storing spatial data into business information technology frameworks. A new taxonomy of spatial data storage systems is developed differentiating storage systems by the systems architectures used to enable interaction between client applications and physical spatial data stores, and by the methods used by client applications to query and return spatial data. Five distinct storage models are identified and discussed along with current examples of vendor implementations. Building on this initial discussion, the chapter identifies a variety of issues pertaining to spatial data storage systems affecting three distinct aspects of technology adoption: systems design, systems implementation and management of completed systems. Current issues associated with each of these three aspects are described and illustrated along with a discussion of emerging trends in spatial data storage technologies. As spatial data and the technologies designed to store and manipulate it become more prevalent, understanding potential impacts these technologies may have on other technology decisions within an organization becomes increasingly important. Furthermore, understanding how these technologies can introduce security risks and other vulnerabilities into a computing framework is critical to successful implementation.

An Energy-Related CityGML ADE and Its Application for Heating Demand Calculation

2019 ◽  
pp. 1306-1323
Author(s):  
Marcel Bruse ◽  
Romain Nouvel ◽  
Parag Wate ◽  
Volker Kraut ◽  
Volker Coors
Keyword(s):  
Energy Demand ◽  
Building Energy ◽  
Energy Simulation ◽  
Data Sets ◽  
Application Domain ◽  
Data Formats ◽  
Building Energy Systems ◽  
Domain Extension ◽  
Energy Simulations ◽  
Heating Energy Demand

Different associated properties of city models like building geometries, building energy systems, building end uses, and building occupant behavior are usually saved in different data formats and are obtained from different data sources. Experience has shown that the integration of these data sets for the purpose of energy simulation on city scale is often cumbersome and error prone. A new application domain extension for CityGML has been developed in order to integrate energy-related figures of buildings, thermal volumes, and facades with their geometric descriptions. These energy-related figures can be parameters or results of energy simulations. The applicability of the new application domain extension has been demonstrated for heating energy demand calculation.

scholarly journals Development of a CityGML Application Domain Extension for Simulating the Building Construction Process

2019 ◽  
Vol 8 (12) ◽  
pp. 576 ◽  
Author(s):  
Chi Zhang ◽  
Yunping Liu ◽  
Chen Lin ◽  
Liangchen Zhou ◽  
Bingxian Lin ◽  
...  
Keyword(s):  
Process Model ◽  
Open Data ◽  
Evolutionary Process ◽  
Building Construction ◽  
Information Modeling ◽  
Application Domain ◽  
Construction Process ◽  
Domain Extension ◽  
Building Information ◽  
The City

Virtual 3D city models can be stored and exchanged in the CityGML open data model. When dynamic phenomena in 3D cities are represented with a CityGML application domain extension (ADE), the objects in CityGML are often used as static background, and it is difficult to represent the evolutionary process of the objects themselves. Although a construction process model in building information modeling (BIM) is available, it cannot efficiently and accurately simulate the building construction process at the city level. Accordingly, employing the arrow diagramming method, we developed a CityGML ADE to represent this process. We extended the hierarchy of the model and proposed the process levels of detail model. Subsequently, we explored a mechanism to associate the construction process and building objects as well as the mechanism to automate construction process transitions. Experiments indicated that the building construction process ADE (BCPADE) could adequately express the characteristics of this process. Compared with the building construction process model in the architecture, engineering, and construction field, BCPADE removes redundant information, i.e., that unrelated to a 3D city. It can adequately express building construction processes at multiple spatiotemporal scales and accurately convey building object behavior during building evolution, such as adding, removal, merging, and change. Such characteristics enable BCPADE to render efficient and accurate simulations of the building construction process at the city level.

scholarly journals AN IMPROVED LOD FRAMEWORK FOR THE TERRAINS IN 3D CITY MODELS

2019 ◽  
Vol IV-4/W8 ◽  
pp. 75-82 ◽  
Author(s):  
K. Kumar ◽  
A. Labetski ◽  
H. Ledoux ◽  
J. Stoter
Keyword(s):  
Proof Of Concept ◽  
3D City Models ◽  
General Acceptance ◽  
3D City Model ◽  
Terrain Models ◽  
City Model ◽  
Definition Of ◽  
3D City Modelling ◽  
Software Prototype ◽  
City Models

<p><strong>Abstract.</strong> The Level of Detail (LOD) concept in CityGML 2.0 is meant to differentiate the multiple representations of semantic 3D city models. Despite the popularity and general acceptance of the concept by the practitioners and stakeholders in 3D city modelling, there are still some limitations. While the CityGML LOD concept is well defined for buildings, bridges, tunnels, and to some extent for roads, there is no clear definition of LODs for terrain/relief, vegetation, land use, water bodies, and generic city objects in CityGML. In addition, extensive research has been done to refine the LOD concept of CityGML for buildings but little is known on requirements and possibilities to model city object types as terrain at different LODs. To address this gap, we focus in this paper on the terrain of a 3D city model and propose a framework for modelling terrains at different LODs in CityGML. As a proof of concept of our framework, we implemented a software prototype to generate terrain models with other city features integrated (e.g. buildings) at different LODs in CityGML.</p>

scholarly journals INFLUENCE OF GSD FOR 3D CITY MODELING AND VISUALIZATION FROM AERIAL IMAGERY

2016 ◽  
Vol XLI-B3 ◽  
pp. 561-565
Author(s):  
Muhamad Alrajhi ◽  
Zafare Alam ◽  
Mohammad Afroz Khan ◽  
Abdalla Alobeid
Keyword(s):  
Large Scale ◽  
3D Visualization ◽  
Aerial Imagery ◽  
Batch Processes ◽  
Three Dimensional Model ◽  
Ground Sample ◽  
3D City Models ◽  
Aerial Triangulation ◽  
3D City Modelling ◽  
City Models

Ministry of Municipal and Rural Affairs (MOMRA), aims to establish solid infrastructure required for 3D city modelling, for decision making to set a mark in urban development. MOMRA is responsible for the large scale mapping 1:1,000; 1:2,500; 1:10,000 and 1:20,000 scales for 10cm, 20cm and 40 GSD with Aerial Triangulation data. As 3D city models are increasingly used for the presentation exploration, and evaluation of urban and architectural designs. Visualization capabilities and animations support of upcoming 3D geo-information technologies empower architects, urban planners, and authorities to visualize and analyze urban and architectural designs in the context of the existing situation. To make use of this possibility, first of all 3D city model has to be created for which MOMRA uses the Aerial Triangulation data and aerial imagery. The main concise for 3D city modelling in the Kingdom of Saudi Arabia exists due to uneven surface and undulations. Thus real time 3D visualization and interactive exploration support planning processes by providing multiple stakeholders such as decision maker, architects, urban planners, authorities, citizens or investors with a three – dimensional model. Apart from advanced visualization, these 3D city models can be helpful for dealing with natural hazards and provide various possibilities to deal with exotic conditions by better and advanced viewing technological infrastructure. Riyadh on one side is 5700m above sea level and on the other hand Abha city is 2300m, this uneven terrain represents a drastic change of surface in the Kingdom, for which 3D city models provide valuable solutions with all possible opportunities. In this research paper: influence of different GSD (Ground Sample Distance) aerial imagery with Aerial Triangulation is used for 3D visualization in different region of the Kingdom, to check which scale is more sophisticated for obtaining better results and is cost manageable, with GSD (7.5cm, 10cm, 20cm and 40cm). The comparison test is carried out in Bentley environment to check the best possible results obtained through operating different batch processes.

Sign in / Sign up

Export Citation Format

Share Document