Valid Space Description in BIM for 3D Indoor Navigation

2016 ◽  
Vol 5 (3) ◽  
pp. 1-17 ◽  
Author(s):  
Abdoulaye Abou Diakité ◽  
Sisi Zlatanova
Keyword(s):  
Construction Projects ◽  
Indoor Navigation ◽  
Structural Components ◽  
Topological Description ◽  
Map Data ◽  
Building Walls ◽  
Models Validation ◽  
Indoor Spaces ◽  
Source Of Information ◽  
Space Description

The BIM paradigm, supplied by appropriate standards like IFC, became unavoidable in recent construction projects. Several applications (e.g. indoor navigation, energy analysis ...) find in it a source of information on which they can rely. However, practices reveal that BIM models are not always directly reliable for applications and the latter have to ensure the validity of the data by their own. In the case of indoor navigation, the calculations will highly rely on the IfcSpace objects describing the rooms, in addition to their spatial relationships with their surrounding components. Unfortunately, it is common to face IFC models in which IfcSpace objects contain wrong geometric and topological description. In this paper, the authors discuss the issues related to BIM models validation for indoor navigation. Furthermore, they present a method to generate valid indoor spaces in IFC models. The approach relies on the structural components of the building (walls, slabs, etc.) and uses topological operations, supported by the combinatorial map data structure, to produce watertight space volumes.

Valid Space Description in BIM for 3D Indoor Navigation

2019 ◽  
pp. 688-706
Author(s):  
Abdoulaye Abou Diakité ◽  
Sisi Zlatanova
Keyword(s):  
Data Structure ◽  
Construction Projects ◽  
Indoor Navigation ◽  
Spatial Relationships ◽  
Map Data ◽  
Building Walls ◽  
Models Validation ◽  
Indoor Spaces ◽  
Source Of Information ◽  
Space Description

The BIM paradigm, supplied by appropriate standards like IFC, became unavoidable in recent construction projects. Several applications (e.g. indoor navigation, energy analysis ...) find in it a source of information on which they can rely. However, practices reveal that BIM models are not always directly reliable for applications and the latter have to ensure the validity of the data by their own. In the case of indoor navigation, the calculations will highly rely on the IfcSpace objects describing the rooms, in addition to their spatial relationships with their surrounding components. Unfortunately, it is common to face IFC models in which IfcSpace objects contain wrong geometric and topological description. In this paper, the authors discuss the issues related to BIM models validation for indoor navigation. Furthermore, they present a method to generate valid indoor spaces in IFC models. The approach relies on the structural components of the building (walls, slabs, etc.) and uses topological operations, supported by the combinatorial map data structure, to produce watertight space volumes.

scholarly journals PENENTUAN LOKASI TOWER CRANE PADA PROYEK KONSTRUKSI BERBASIS SIMULASI

2020 ◽  
Vol 3 (4) ◽  
pp. 1305
Author(s):  
Gerwyn Persulessy ◽  
Basuki Anondho
Keyword(s):  
Travel Time ◽  
Construction Projects ◽  
Tower Crane ◽  
Location Determination ◽  
Heavy Equipment ◽  
Total Travel Time ◽  
Speed Up ◽  
High Level ◽  
Map Data ◽  
Geometric Layout

Development of high-level building construction projects that require complex equipment that can be used in high-level construction, equipment used to help complete construction projects called heavy equipment. One of the heavy equipment used in high-rise buildings is a tower crane. The use and layout of tower cranes can speed up the schedule and save on project costs. Therefore many methods have been developed to determine the tower crane layout. This study will discuss determining the location of tower cranes by discussing simulations. The location will be determined based on the site map data which is processed in the form of a geometric arrangement and tower crane data specifications. Location determination is done by comparing the total travel time of several simulated locations according to several different speed criteria in a construction project. Speed criteria are divided into four times the jib speed and trolley speed. Location of the location with the total travel time will be taken as the final result. Different speed criteria will make the total travel time change. ABSTRAKPerkembangan proyek pembangunan gedung bertingkat tinggi yang semakin kompleks menyebabkan diperlukannya peralatan yang dapat mempermudah pembangunan gedung bertingkat, peralatan yang digunakan untuk membantu menyelesaikan tugas konstruksi disebut alat berat. Salah satu peralatan berat yang digunakan pada gedung bertingkat tinggi adalah tower crane. Penggunaan dan tata letak tower crane yang baik dapat mempercepat jadwal dan menghemat biaya proyek. Oleh karena itu banyak dikembangkan metode-metode untuk menentukan tata letak tower crane. Penelitian ini akan membahas penetapan letak lokasi tower crane dengan pendekatan  simulasi. Letak lokasi akan ditetapkan berdasarkan data site map yang diolah dalam bentuk geometric layout dan data spesifikasi tower crane. Penetapan lokasi dilakukan dengan cara membandingkan total travel time dari beberapa lokasi yang disimulasi sesuai dengan beberapa kriteria kecepatan yang berbeda-beda pada suatu proyek konstruksi. Kriteria kecepatan terbagi menjadi empat berdasarkan besarnya kecepatan jib dan kecepatan trolley. Letak lokasi dengan total travel time terkecil akan diambil sebagai hasil akhir. Kriteria-kriteria kecepatan yang berbeda disimulasi akan membuat total travel time berubah.

scholarly journals Development of an Omnidirectional-Image-Based Data Model through Extending the IndoorGML Concept to an Indoor Patrol Service

2017 ◽  
Vol 2017 ◽  
pp. 1-14 ◽  
Author(s):  
Hyo-jin Jung ◽  
Jiyeong Lee
Keyword(s):  
Data Model ◽  
Indoor Navigation ◽  
Location Based Services ◽  
Indoor Location ◽  
Indoor Space ◽  
Omnidirectional Image ◽  
Space Data ◽  
Omnidirectional Images ◽  
Indoor Spaces ◽  
Topological Data

Different indoor representation methods have been studied for their ability to provide indoor location-based services (LBS). Among them, omnidirectional imaging is one of the most typical and simple methods for representing an indoor space. However, a georeferenced omnidirectional image cannot be used for simple attribute searches, spatial queries, and spatial awareness analyses. To perform these functions, topological data are needed to define the features of and spatial relationships among spatial objects including indoor spaces as well as facilities like CCTV cameras considered in patrol service applications. Therefore, this study proposes an indoor space application data model for an indoor patrol service that can implement functions suited to linking indoor space data and service objects. In order to do this, the study presents a method for linking data between omnidirectional images representing indoor spaces and topological data on indoor spaces based on the concept of IndoorGML. Also, we conduct an experimental implementation of the integrated 3D indoor navigation model for patrol service using GIS data. Based on the results, we evaluate the benefits of using such a 3D data fusion method that integrates omnidirectional images with vector-based topological data models based on IndoorGML for providing indoor LBS in built environments.

scholarly journals TATU: an Approach for Supporting Tourists with Disabilities to Indoor and Outdoor Navigation using Mobile Devices

2021 ◽  
Author(s):  
Fábio J. Coutinho ◽  
Dayvson Sales ◽  
Wagner Fontes ◽  
Samuel Lucas V. L. Barbosa ◽  
Victor Accete ◽  
...  
Keyword(s):  
Hearing Impairment ◽  
Mobile Application ◽  
Public Spaces ◽  
Indoor Navigation ◽  
Tourist Attractions ◽  
Adaptive Interface ◽  
Guided Tour ◽  
Indoor Spaces ◽  
Indoor And Outdoor ◽  
Outdoor Navigation

People with disabilities living in Brazil face great difficulties in the tasks of daily life mainly due to the lack of accessibility in public spaces, products and services. In this context, we noticed a lack of a computing tool that embraces both people with visual and hearing impairment. This work presents TATU -- a mobile application for both Android and iOS platforms aimed at supporting people with visual or hearing impairment to enjoy Brazilian tourist attractions, including both open-air and indoor spaces. TATU application has an adaptive interface exclusively designed for each of the impairment user profiles, it can work on guided tour mode by indoor navigation using BLE beacons and outdoor navigation using GPS. Our solution was evaluated by three experiments, one of which was carried out with blind volunteers and TATU application obtained satisfactory results for both spacious attractions with the lowest density of collection items and for the smallest spaces.

scholarly journals Information model of the construction process in space and time

2021 ◽  
Vol 258 ◽  
pp. 09008
Author(s):  
Vadim Kabanov
Keyword(s):  
Construction Projects ◽  
3D Model ◽  
Information Model ◽  
Quantitative Information ◽  
Construction Process ◽  
Space And Time ◽  
Information Models ◽  
Building Process ◽  
Software Product ◽  
Source Of Information

BIM 3D technologies are traditionally used in the design of construction projects. The prospect of turning BIM 3D into BIM 5D is associated with the need to build information models of the construction process that are able to accurately determine the coordinates of construction and installation work at any time. The purpose of this work is to build an information model in space and time. The paper substantiates the sources of initial quantitative information. A BIM 3D model of a object of construction is a source of information for determining the coordinates (position in space) of the construction process. To calculate the speed of construction, it is proposed to use information about construction resources using national codes. A mathematical apparatus is proposed that can integrate the construction speed value into coordinates using BIM 3D technologies. A flowchart for software product development is proposed. The information model of the building process in space is represented as a vector. The coordinates of the beginning of a vector can always be represented as: X = 0, Y = 0, Z = 0, and the coordinates of the end of this vector are: X, Y, Z. Moving along the vector is described depending on the speed of build.

scholarly journals INDOOR SPACE ROUTING GRAPHS: VISIBILITY, ENCODING, ENCRYPTION AND ATTENUATION

2018 ◽  
Vol XLII-4 ◽  
pp. 579-585
Author(s):  
G. Sithole
Keyword(s):  
Path Planning ◽  
Indoor Environment ◽  
Indoor Navigation ◽  
Indoor Space ◽  
The Third ◽  
Future Paper ◽  
Spatial Geometry ◽  
Novel Method ◽  
Third Dimension ◽  
Indoor Spaces

<p><strong>Abstract.</strong> The conventional approach to path planning for indoor navigation is to infer routes from a subdivided floor map of the indoor space. The floor map describes the spatial geometry of the space. Contained in this floor map are logical units called subspaces. For the purpose of path planning the possible routes between the subspaces have to be modelled. Typical these models employing a graph structures, or skeletons, in which the interconnected subspaces (e.g., rooms, corridors, etc.) are represented as linked nodes, i.e. a graph.</p><p>This paper presents a novel method for creating generalised graphs of indoor spaces that doesn’t require the subdivision of indoor space. The method creates the generalised graph by gradually simplifying/in-setting the floor map until a graph is obtained, a process described here as chained deflation. The resulting generalised graph allows for more flexible and natural paths to be determined within the indoor environment. Importantly the method allows the indoor space to be encoded and encrypted and supplied to users in a way that emulates the use of physical keys in the real world. Another important novelty of the method is that the space described by the graph is adaptable. The space described by the graph can be deflated or inflated according to the needs of the path planning. Finally, the proposed method can be readily generalised to the third dimension.</p><p>The concept and logic of the method are explained. A full implementation of the method will be discussed in a future paper.</p>

Android-Based Visual Tag Detection for Visually Impaired Users

2014 ◽  
Vol 5 (1) ◽  
pp. 63-80 ◽  
Author(s):  
Hao Dong ◽  
Jieqi Kang ◽  
James Schafer ◽  
Aura Ganz
Keyword(s):  
User Interface ◽  
Visually Impaired ◽  
Indoor Environment ◽  
Detection Algorithm ◽  
Indoor Navigation ◽  
Lighting Conditions ◽  
Sampling Probe ◽  
Indoor Spaces

In this paper the authors introduce PERCEPT-V indoor navigation for the blind system. PERCEPT-V enhances PERCEPT system by enabling visually impaired users to navigate in open indoor spaces that differ in size and lighting conditions. The authors deploy visual tags in the environment at specific landmarks and introduce a visual tag detection algorithm using a sampling probe and cascading approach. The authors provide guidelines for the visual tag size, which is a function of various environmental, and usage scenarios, which differ in lighting, dimensions of the indoor environment and angle of usage. The authors also developed a Smartphone based user interface for the visually impaired users that uses Android accessibility features.

scholarly journals Sustainable regeneration project delivery in UK

2018 ◽  
Vol 16 (1) ◽  
pp. 87-100 ◽  
Author(s):  
Julius Akotia ◽  
Alex Opoku
Keyword(s):  
Construction Projects ◽  
Project Delivery ◽  
Structured Interviews ◽  
Content Type ◽  
Level Of Involvement ◽  
Project Life Cycle ◽  
Research Findings ◽  
The Uk ◽  
Project Life ◽  
Source Of Information

Purpose The purpose of this paper is to explore the key practitioners’ level of involvement in the delivery of sustainable regeneration projects in the UK. Practitioners’ level of involvement is a major factor that has and continues to determine the delivery of sustainability outcomes of regeneration projects. Design/methodology/approach The paper adopted a qualitative study that obtained data from 21 key practitioners through semi-structured interviews in exploring practitioners’ level of involvement in the delivery of sustainable regeneration projects in the UK. The semi-structured interviews are conducted with seven practitioners, each from the three construction organisations selected through a purposive sampling approach for the study. Findings The findings identify varied levels of involvement of the key practitioners at the three delivery stages – early, construction and post-construction of the projects. The findings further reveal that clients’ representatives, commercial managers and architects are the most frequently involved practitioners during the early stages of the projects. The findings also indicate that practitioners who have sustainability assigned to their roles and their responsibilities, such as sustainability managers, are the least involved in all the three delivery stages of the projects. Research limitations/implications The study involves interview with 21 practitioners from three organisations delivering sustainable regeneration projects; hence, this could limit the generalisation of the research findings. However, the findings of this study could serve as a useful source of information for the further study in this area. Practical implications The paper is of the view that the level of key practitioners’ involvement in the delivery of the projects will have an impact on their knowledge and will determine how sustainability benefits are promoted and delivered from the projects. Originality/value Although some studies have been carried out on practitioners’ engagement in the delivery of “normal” construction projects, none has focussed on practitioners’ levels of involvement in sustainable regeneration projects. Hence, this study has brought to the fore how the key practitioners tasked with the responsibilities of delivering sustainability benefits of regeneration projects have been involved (at various levels of the project life cycle) in the delivery of these projects.

scholarly journals EXTRACTING TOPOLOGICAL RELATIONS BETWEEN INDOOR SPACES FROM POINT CLOUDS

2017 ◽  
Vol IV-2/W4 ◽  
pp. 401-406 ◽  
Author(s):  
H. Tran ◽  
K. Khoshelham ◽  
A. Kealy ◽  
L. Díaz-Vilariño
Keyword(s):  
Emergency Management ◽  
Principal Components ◽  
Point Clouds ◽  
3D Models ◽  
Indoor Navigation ◽  
Location Based Services ◽  
Indoor Environments ◽  
Topological Relations ◽  
Indoor Location ◽  
Indoor Spaces

3D models of indoor environments are essential for many application domains such as navigation guidance, emergency management and a range of indoor location-based services. The principal components defined in different BIM standards contain not only building elements, such as floors, walls and doors, but also navigable spaces and their topological relations, which are essential for path planning and navigation. We present an approach to automatically reconstruct topological relations between navigable spaces from point clouds. Three types of topological relations, namely containment, adjacency and connectivity of the spaces are modelled. The results of initial experiments demonstrate the potential of the method in supporting indoor navigation.

scholarly journals Evaluation of the positional accuracy of subsurface utilities

2021 ◽  
Author(s):  
Vijayaluxmy Santhakumar
Keyword(s):  
Construction Projects ◽  
Positional Accuracy ◽  
Right Of Way ◽  
Underground Infrastructure ◽  
New Construction ◽  
Utility Information ◽  
Initial Source ◽  
The Right ◽  
The City ◽  
Source Of Information

Since WWII, the urban underworlds have become a web of utility lines, including telecommunication lines, buried electricity lines, gas mains, watermains, cable TV, fiber optic cables, street lighting, and storm and sanitary sewers. From preliminary design stages to breaking ground on new construction projects; owners, designers, engineers, and contractors rely on existing underground utility records as an initial source of information. There is a constant need for underground utility information and most of the city's existing utility records are not only irretrievable, but are also out-of-date. According to research done in the past, records and visible feature surveys by site are a significant percentage off the mark and, in some cases, considerably worse. This study focuses on the evaluation of the positional accuracy of subsurface utilities within seven projects, within the City of Toronto, using an offset approach. It also aims to reveal the magnitude of the problem surrounding the obtainment, analyzation, and interpretation of information with respect to underground infrastructure facilities. None of the projects show any relationship or correlation with positional accuracy and the factors that are thought to affect the accuracy of underground utility information (e.g. type of soil, type of utility, date of installation, right-of-way, etc.). The analysis indicates a clear indication of no systematic patterns between the right-of-way parameters and utility type parameters. Based on the results of this study it can be stated that the process of obtaining subsurface utility information is still a time-consuming, inefficient, costly, and difficult process.

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