Infrastructure Engineering - Research Publications
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ItemLinking Land Administration Domain Model and BIM environment for 3D digital cadastre in multi-storey buildings(Elsevier BV, 2021-05-01)3D digital cadastral systems intend to provide a fully-integrated 3D view of legal boundaries and rights, restrictions and responsibilities (RRR) in multi-storey properties, which is aligned with the physical reality. Our cognitive understanding of legal boundaries and RRR information is more communicable when we link it to our visual perception of the real world. However, there is a knowledge gap in logical relationships between legal and physical views as most of the existing approaches that integrate 3D legal and physical dimensions have been mainly proposed on a conceptual level. The main argument of this study is that the multi-dimensional nature of BIM provides the ability to extend this environment with concepts defined in Land Administration Domain Model (LADM) for the purpose of 3D digital cadastre in buildings. Therefore, this study investigated how an open BIM-based data model, known as Industry Foundation Classes (IFC), can be extended with LADM data elements to support integration of legal and physical views. This will create a linkage between LADM and BIM environment, which would subsequently provide a better cognitive understanding of legal spaces.
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ItemDesign and development of an LADM-driven 3D Land administration system: Lessons learned in Malaysia(ELSEVIER SCI LTD, 2021-03)Urban infrastructure has been dramatically increasing in Malaysian cities over the last decades. The current 2D-based practices are challenged by the stratified development of urban land in underground and aboveground areas. Currently, in Malaysia, surveying measurements are stored in a 2D-based cadastral database in the form of horizontal coordinates. However, this method is not capable to accommodate ownership complexities in the vertical dimension. The existing methods to capture, compute and adjust cadastral survey data need to be upgraded for the purpose of implementing a 3D land administration system (LAS) in Malaysia. The transformation from 2D to 3D LAS should be in accordance with a standard-based approach. Land Administration Domain Model (LADM): ISO 19152:2012 provides an internationally accepted standard model for recording and managing cadastral data. This study aims to design and develop an LADM-driven 3D LAS for Malaysia by building on existing research carried out for LADM adoption in this country. The proposed approach includes modifications in the existing workflows for capturing 3D survey data, new architecture to support 3D land parcels, and a new database for creating an LADM-based 3D LAS in line with data requirements in Malaysia. The major part of the upgrade from 2D to a 3D environment consists of capturing, processing and management of height of survey points that define parcel boundaries. This study demonstrated and confirmed that the LADM standard plays a significant role in realising a 3D-enabled system for Malaysian land administration.
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ItemGeometrical data validation in 3D digital cadastre: A case study for Victoria, Australia(Elsevier, 2017-11-01)Data ambiguity and invalidity can cause significant expensive issues in the cadastral domain (e.g. legal disputes). An automated data validation can significantly help to reduce the potential issues. Quality assurance has been comprehensively investigated in various domains, however, the validation of 3D cadastral data is still in its early development. The availability of various regular and irregular shapes for 3D cadastral objects and modern building designs has resulted in a critical need for developing validation rules to ensure data validity and quality. The land registry in Victoria, Australia, is investigating the technical requirements for implementing a 3D digital cadastre. The study of 3D cadastral data validation requirements has been part of this ongoing investigation. This study is being undertaken in three main phases including 1) developing geometrical validation rules, 2) developing non-geometrical validation rules, 3) implementing an online service to validate 3D cadastral data. This paper aims to discuss the initial outcomes of the first phase of the aforementioned study which has focused on developing geometrical validation rules for 3D cadastral objects. The paper reviews the development of four geometrical validation rules which have been formalised using mathematical expressions to check the individual 3D parcels and their relationships with adjoining or neighbouring parcels. The first validation rule checks the compatibility of the cancelled parcel against the created parcels. The second rule deals with parcel collision detection which is required for flagging unacceptable intersection of 3D objects. The third rule ensures the faces forming a 3D parcel are flat. The fourth validation rule assures 3D objects are watertight. The paper concludes with a discussion around the impacts of the proposed validation checks on the subdivision process and future research for the Victorian 3D digital cadastre.
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ItemTowards a foundation for spatial metadata automation(TAYLOR & FRANCIS LTD, 2012)