Development of 3D Cadastre Strata Building Information Model: An interactive Web-based Prototype

Abstract

The "3D cadastral strata building information model prototype" project aims to enhance land administration practices in Bhutan by developing a comprehensive solution for the digital representation of 3D land parcels. Through cadastral surveying, plot fragmentation analysis, and 3D building modeling, the project ensures the accurate depiction of land ownership information in compliance with Bhutan’s Lagthram system and the Strata Transaction Guidelines of 2021. At present, the system operates within a 2D spatial framework, where cadastral objects encompass entire land parcels, strata such as apartment buildings, or subterranean parcels. However, both land and property owners’ requirements reveal the inadequacy of solely relying on 2D cadastral parcel registration, as real estate assets inherently exist in three dimensions. Utilizing advanced surveying technologies and the Django framework, the project creates an intuitive website interface that facilitates seamless access and management of land data, enabling stakeholders to visualize landscapes and explore detailed ownership information, including airspace and subsurface rights, in 3D mode. By providing a holistic perspective on land parcels and property rights, the project supports informed decision-making, resource allocation, and sustainable urban development. In summary, the project presents a pioneering approach to land administration, aiming to improve transparency, efficiency, and equity in land management practices, thereby contributing to sustainable development in Bhutan and beyond.