New International Standard Set to Revolutionize Property Valuation in Land Administration

What is it about?

In a significant development for land administration systems worldwide, the ISO 19152:2012 Land Administration Domain Model (LADM) is being expanded to include a groundbreaking property valuation component. This latest innovation, termed the LADM Valuation Information Model, is poised to redefine how public authorities manage and integrate property valuation data across various registries and databases. The LADM, recognized for its focus on Rights, Responsibilities, and Restrictions (RRR) related to land, has historically not included land value functions. However, this extension, on the agenda for the upcoming second edition of LADM under ISO/TC211, aims to fill that gap. A recent case study in Turkey has highlighted the operability of this new conceptual model. Researchers developed a prototype implementing the LADM Valuation Information Model, offering a glimpse into the future of efficient and integrated land administration systems. This prototype was rigorously tested using data from recurrent property valuation processes in Turkey, showcasing the model's capability to handle complex valuation information over time.

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Photo by Chester Ho on Unsplash

Photo by Chester Ho on Unsplash

Why is it important?

Key to this development has been the creation of a country-specific profile using Conceptual Schema Languages (CSL) of the Unified Modelling Language (UML) and INTERLIS - a formal language and suite of tools supporting LADM implementations. This approach has enabled the seamless transformation of the country profile into various technical models, marking a significant advancement in land administration technology. The prototype, enriched with sample datasets including geometries of valuation units and valuation data spanning several years, has demonstrated its efficiency through a series of queries, affirming its potential to meet the information management needs of recurrent valuations. This breakthrough is not just a technical achievement; it represents a holistic approach to property valuation in land administration. By enabling interoperability across systems and providing a common framework for local and national valuation databases, the LADM Valuation Information Model sets a new international standard, promising more efficient and integrated property valuation management globally. The global land administration community eagerly anticipates the release of the second edition of LADM, which is expected to incorporate this innovative valuation model, heralding a new era in land and property management.