The growing recognition and influence of the ISO 19152:2012 Land Administration Domain Model (LADM), is revealed by the multiple country profiles that have been developed based on the standard in various jurisdictions across the world. The ongoing revision of the LADM Edition I, initiates discussions related to the development of country profiles, as well as considerations regarding their maintenance. Till today, various approaches for creating LADM-based country profiles have been followed. This resulted in the creation of an interesting mosaic of country profiles’ developing methods, with parts to be exploited and an outline of the basic steps of the development provided. Based on this knowledge, the aim of this paper is to design a methodology for the development of LADM country profiles, expected to become part of future version of the ISO 19152 LADM, the Edition II. Collective experience from good practices in the development of profiles based on LADM Edition I reported in the literature have been reviewed and used as basis for a qualitative comparative analysis. For this purpose, a set of six characteristics/criteria was developed based on key publications selected through experts’ consultation. The characteristics are generic and can be applied to all the country profiles, as well as they refer to the lifecycle of the development and implementation of a country profile, taking into account legal, institutional and technical issues. Characteristics regarding the scope of country profiles are also considered. Given this context, the design of the methodology to develop LADM-based country profiles is presented, structured in three phases: scope definition, profile creation and profile testing.

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The wider recognition and use of ISO 19152 LADM Edition I, is mainly documented through the country profiles that have been developed in multiple jurisdictions across the world. Various approaches for developing country profiles have been followed, without acting in accordance with a specific (official or unofficial) roadmap or methodology. This has resulted in an interesting mosaic of country profiles, which at the same time, highlights the need to outline the basic steps that need to be followed in order to develop a country profile. Currently, the revision of the LADM Edition I is ongoing, and the discussion for the development, maintenance and update of the existing and future LADM-based country profiles has been initiated. Therefore, it is considered a good timing to address the experience gained from the developed country profiles and introduce methodological steps for the development of country profiles. This paper reflects on the country profiles that have been developed so far, identifying similarities and discrepancies on the path followed, bearing in mind the scope and objective of the development of those profiles and their level of maturity, also conforming to the land registration system and national jurisdiction. Thus, the paper is separated in three main parts: the first part that introduces the LADM revision and its scope, reflects on the existing country profiles and outlines the components of the proposed methodology. The second part presents an LADM-based country profile for Malaysia, as an example application of the proposed methodology. Finally, the last part is dedicated to the discussion, conclusions and proposals for future steps in the context of LADM revision.@en

Managing properties and people’s interests in complex multi-level developments is rapidly increasing the last decade and as a result, current cadastral information systems are facing a growing demand to capture, register, maintain, visualise and disseminate 3D spatial information. This has led to a continuous research, at the international scenery, for 3D models and standardization initiatives that help communicate the legal and spatial notions of the built environment. Each of Australia’s states has already established a well-functioning Cadastral Information System, which are progressively moving towards 3D Cadastre. Alongside, the LADM ISO 19152 has gained ground and since its adoption as international standard there have been several attempts by different jurisdictions worldwide to adopt LADM. This however, does not apply for Australia, as only one country profile has been developed – for Queensland – back in 2012. Considering that the LADM edition I revision has already started and through this process improvement and extensions of the current conceptual model, technical LADM specifications through application schemas and encodings, as well as process models will be discussed and investigated, it was a challenge to investigate the possibilities of adopting LADM in Victoria. Given this background, at this paper an approach to model the spatial counterpart of a future LADM-based profile for Victoria is presented, in the context of exploring the implementation issues of 3D Cadastre in Victoria, Australia using LADM. The current status of 2D and 3D cadastral developments in Victoria is presented and the direction towards the adoption of LADM in Victoria is introduced. To be able to develop a LADM Victoria country profile, which will describe the existing situation, but at the same time will be future proof, as first step the mapping between the two existing data models and LADM classes is performed.@en

Processes and transactions in Land Administration are outside the scope of the Land Administration Domain Model Edition I published in 2012. Reason is that processes were considered to be country specific. Generic processes would be too difficult to model. This view needs reconsideration – given developments as Fit-For-Purpose Land Administration, Apps and blockchain. In many countries different organizations have their own responsibilities in data maintenance and supply, but may communicate on the basis of standardised administrative and technical update processes. Operationalisation and implementation of LADM requires attention to this aspect - at least at conceptual level (not prescriptive). This will an issue in the development of LADM Edition II and this is the issue that is explored in this paper.@en

Processes and transactions in Land Administration are outside the scope of the original Land Administration Domain Model (LADM) Edition I as published in 2012. Processes were considered to be country specific. By then generic processes were too difficult to model. This view needs reconsideration – given developments as Fit-For-Purpose Land Administration, Mobile Apps and blockchain processes. In many countries different organizations have their own responsibilities in data collection, data maintenance and distribution. But they all communicate on the basis of standardised administrative and technical processes. Operationalisation and implementation of LADM requires attention to this aspect, at least at conceptual level and should not be prescriptive. Nevertheless the development of the LADM is and was based on user needs. The global market and globalization are constantly influencing and introducing new processes for data collection, data maintenance and distribution all requiring a shared ontology, These administrative and technical processes will be discussed during the development of LADM Edition II. Issues in this debate will be presented in this paper. Those processes are not just transactions but the Fit-For-Purpose approach in Land Administration enables the inclusions of processes as such as: selection of imagery, automated feature extraction, initial data collection with mobile apps, etc. Also the application of blockchain for transaction management is an issue. The operationalisation of those processes and tools, at scale (apart from conventional cadastral processes which may be complex to standardise) is an issue given the ambitions in the Sustainable Development Goals to bring tenure security for all. The Open Geospatial Consortium initiated operationalisation of land administration standards as LADM and there is a cooperation with the International Standardisation Organisation in this respect.@en

Subdivision of land parcels in the vertical space has made it necessary for cadastral jurisdictions to manage cadastral objects both in 2D as well as 3D. Modern sensor and hardware capabilities for capture and utilisation of large point clouds is one of the major drivers to consider Spatial Database Management Systems (SDBMS) in 3D and organisations are still progressing towards it. 3D data models and their topological relationships are two of the important parts of 3D spatial data management. 3D spatial systems should enable data models that handle a large variety of 3D objects, perform automated data quality checks, search and analysis, rapid data dissemination, 3D rendering and visualisation with close linkages to standards. This chapter asserts that while there has been work done in defining 2D and 3D vector geometry in standards, it is still not sufficient for 3D cadastre purposes as 3D cadastral objects have a much more rigorous definition. The Land Administration Domain Model (LADM), which is an ISO Standard, addresses many of the issues in 3D representation and storage of 3D data in a database management system (DBMS). The chapter further discusses the various approaches to storing 3D data such as through voxels, or point cloud data type and elaborates on the characteristics of a 3D DBMS capable of storing 3D data. Approaches for spatial indexing to improve the fast access of data and the various available options for a 3D geographical database system are presented. Several spatial operations on and amongst 3D objects are illustrated with linkages to the current standards including the LADM. Next, construction of 3D topological and geometrical models based on standards and including their characteristics is discussed. Current 3D spatial database managements systems and their characteristics, including some comparison between selected DBMS including the hardware capabilities are elaborated in detail. Finally, the chapter proposes a 3D topology model based on Tetrahedron Network (TEN) synchronised with LADM specifications for 3D cadastral registration. This topological model utilises surveying boundaries to generate 3D cadastral objects with consistent topology and rapid query and management capabilities. The definition for validation of 3D solids also considers the automatic repair of invalid solids. Point cloud and TEN related data structures available in SDBMSs are also investigated to enable storage of non-spatial attributes so that database updates would store all spatial and attribute information directly inside the spatial database.@en

This paper presents the first and incomplete draft text for the revision of IS 19152:2012 ‘Geographic information — Land Administration Domain Model (LADM)’ within ISO TC211 in the form of a New Working Item Proposal (NWIP). This ‘two-page NWIP’ text aims to describe the scope of proposed project to revise, and also provides the purpose and justification behind this revision of LADM. The International Federation of Surveyors (FIG) also submitted to ISO the NWIP for the current version of LADM (IS 19152:2012). As for the revision the ambition is now to go beyond just a conceptual model by providing steps towards implementations (e.g. more specific profiles, technical model in various encodings, etc.), it is the intention that the Open Geospatial Consortium, Inc. (OGC) is heavily involved in the revision and that the result is a joint ISO/OGC standard. For this purpose the recent draft OGC White Paper is added as Appendix 1 to this paper to provide more detail background information. It is further noted that the complete NWIP for Edition II of LADM also ‘Preparatory work’ should be attached; e.g. a draft of the new version of the standard. In the case of the revised LADM standard of course this is based on the IS 19152:2012, but will contain also contain collected materials from the LADM2017 and LADM2018 workshop.@en

Processes and transactions in Land Administration are outside the scope of the Land Administration Domain Model Edition I published in 2012. Reason is that processes were considered to be country specific. Generic processes would be too difficult to model. This view needs reconsideration – given developments as Fit-For-Purpose Land Administration, Apps and blockchain. In many countries different organizations have their own responsibilities in data maintenance and supply, but may communicate on the basis of standardized administrative and technicalupdate processes. Operationalization and implementation of LADM requires attention to this aspect - at least at conceptual level (not prescriptive). This will an issue in the development of LADM Edition II and this is the issue that is explored in this paper. @en

In this chapter we address various aspects of 3D Cadastral Information Modelling. Of course, this is closely related to the legal framework and initial registration as presented in the first two chapters. Cadastral data models, such as the Land Administration Domain Model, which include 3D support, have been developed for legal information modelling and management purposes without providing correspondence to the object’s physical counterparts. Building Information Models and virtual 3D topographic/ city models (e.g. LandXML, InfraGML, CityGML, IndoorGML) can be used to describe the physical reality. The main focus of such models is on the physical and functional characteristics of urban structures (Aien et al, 2015). However, by definition, those two aspects need to be interrelated; i.e. a tunnel, a building, a mine, etc. always have both a legal status and boundaries as well as a physical description; while it is evident that their integration would maximise their utility and flexibility to support different applications. A model driven architecture approach, including the formalization of constraints is preferred. In the model driven architecture design approach as proposed by the Object Management Group the information model, often expressed in the form of a UML class diagram is the core of the development. This so-called Platform Independent Model (PIM, as presented in the current chapter) is then transformed into Platform Specific Model (PSM). This could be a relational database schema for a spatial DBMS (as will be discussed in the next chapter), or XML schema for a data exchange format or the structure of maps, forms and tables as used in the graphic user interface of a spatial application. Constraints have proved effective in providing the solutions needed to avoid errors and enable maintenance of data quality; thus the need to specify and implement them. This chapter explores possibilities of linking 3D legal right, restriction, responsibilities spaces, modelled with the Land Administration Domain Model (ISO 19152), with physical reality of 3D objects (described via CityGML, IFC, InfraGML, etc).@en

This paper proposes a discussion on opportunities offered by 3D visualization to improve the understanding and the analysis of cadastre data. It first introduce the rationale of having 3D visualization functionalities in the context of cadastre applications. Second the publication outline some basic concepts in 3D visualization. This section specially addresses the visualization pipeline as a driven classification schema to understand the steps leading to 3D visualization. In this section is also presented a brief review of current 3D standards and technologies. Next is proposed a summary of progress made in the last years in 3D cadastral visualization. For instance, user’s requirement, data and semiotics, and platforms are highlighted as main actions performed in the development of 3D cadastre visualization. This review could be perceived as an attempt to structure and emphasise the best practices in the domain of 3D cadastre visualization and as an inventory of issues that still need to be tackled. Finally, by providing a review on advances and trends in 3D visualization, the paper initiates a discussion and a critical analysis on the benefit of applying these new developments to cadastre domain. This final section discusses about enhancing 3D techniques as dynamic transparency and cutaway, 3D generalization, 3D visibility model, 3D annotation, 3D data and web platform, augmented reality, immersive virtual environment, 3D gaming, interaction techniques and time.@en

The paper describes the ongoing developments and standardisation in land administration. Standards are relevant in relation to build as well as maintain and develop a land administration. Standards like the ISO 19152 Land Administration Domain Model (LADM) are helping to jump-start new initiatives and are connecting top-down and bottom-up projects together. The LADM facilitates the efficient set-up of land administration and can function as the core of any land administration system. LADM is flexible, widely applicable and functions as a central source of state-of-the-art international knowledge on this topic. Some future trends in the domain and the maintenance of the standard are presented and being discussed in the paper. These trends may be relevant for the development of a second edition of the LADM over the coming years. These models do not include land administration processes for initial data acquisition, data maintenance and data publication. This is because these processes were considered to be country-specific when the first edition of LADM was prepared; a generic and global approach was likely to be difficult to model. This view may now need reconsideration.@en