Description

The 14th International FIG Workshop on the Land Administration Domain Model & 3D Land Administration will take place in Sofia, Bulgaria, 1-2 October 2026. It will be a joint event together with 21st International 3D GeoInfo Conference (28-29 September 2026) and 10th International Smart Data and Smart Cities Conference (29 September - 1 October 2026). The event is hosted by the Big Data for Smart Society (GATE) Institute, Sofia, Bulgaria. More information and registration for the joint event on https://conference.gate-ai.eu/GeoSofia2026.

Workshop purpose: The workshop aims to bring together experts from the industry, government, and academia, to present and discuss LADM and/or 3D LA related developments including live demonstrations of LADM implementations (operational systems, pilots, prototypes). The workshop will also cover informal or customary rights (restrictions, responsibilities) as exiting in many countries, next to the more formal rights that are being registered. Speakers who want to share their experiences on implementation are cordially invited to participate. This workshop will provide solid input to the "Implementation" part of Edition II of LADM, to be developed in collaboration with OGC. The workshop should enable making important choices, such as the technical encodings.

3D Land Administration: The increasing complexity of infrastructures and densely built-up areas requires a proper registration of the legal status (private and public), which can only be provided to a limited extent by the existing 2D cadastral registrations. The registration of the legal status in complex 3D situations will be investigated under the header of 3D Land Administration. The Workshop on the Land Administration Domain Model / 3D Land Administration addresses developments in the following areas:

• 3D Land Administration System operational experiences (analysis, LADM based, learn from each other, discover gaps)
• 3D LAS cost effective workflow for new / updated 3D parcels = 4D (part of whole spatial development lifecycle: from planning / design / permit in 3D, to registration / use in 3D)
• Legal aspects for 3D LAS, best legal practices in various legislation systems
• BIM/IFC use and guidelines for design sources (LA_DesignSource)
• Remote sensing (including LiDAR) and artificial intelligence (AI) for efficient 3D cadastral boundary extraction in the survey sources (LA_SurveySource)
• Proposals for (and evaluations of) LA (remote) sensing information models and data processing workflows
• 3D LAS web-based dissemination (usability, man-machine interfaces, including mobile/AR)
• Focus on large cities, including developing countries
• LADM specializations for customary RRRs, such as STDM, SOLA/Open Tenure, MAST (possibly with attention for 3D and valuation)
• 3D in the use of ISO 19152 edition II, the Land Administration Domain Model

LADM Edition II: ISO TC211 has revised LADM with new, additional functionalities, such as: a refined (3D) survey and legal model, semantically rich code lists, marine space geo-regulations, valuation information, and spatial plan information. This forms the backbone of a nations land information infrastructure. LADM edition II is organized as a multi-part standard, and all the conceptual models have been published in parts 1 tot 5. The Land Administration Domain Model is gaining recognition in more and more countries. There are country profiles from many countries - of which a large number have implemented (or are implementing) LADM. Software suppliers have adopted LADM and this is used in various implementations. The existing edition of LADM standard does not pay attention to implementation aspects. It can be done in various ways, and several platforms and encodings can be used. What are the experiences so far? What have we learned and what can be re-used? What are the pitfalls and risks? The usage of active and passive remote sensing techniques such as RGB and multispectral sensors, LiDAR, RADAR etc. have resulted in progress in efficiency and accuracy of spatial data aquisition workflows. In addition, artificial intelligence (AI) methods have been extensively explored and tested for cadastral boundary extraction. It is now time capture the implementation knowledge and include this in the future edition of LADM (part 6 Implementation). LADM is currently just a conceptual model and the steps towards implementation include elaborating (via a country profile) and realizing a technical model suitable for implementation: database schema (SQL DDL), exchange format (GeoJSON, INTERLIS, RDF, XML/GML, ), and user interface for edit and dissemination. A good option for this is the collaboration between FIG, ISPRS, IHO, ISO and OGC to also standardize these implementation aspects of LADM as part 6.