Design of a Crowdsourced 3d Cadastral Technical Solution

Abstract

Abstract. Over the last half century, the world has witnessed rapid urbanization which is expected to increase over the near future. Use and property rights are reflected as a complex equation of overlapping interests. A fit-for-purpose approach for the initial registration of such rights is of a great importance both in formally and informally developed urban areas, as it may empower tenure security, improve property management, formalize property markets and enable poverty reduction. In this paper a more generalized framework, adjustable to the available cartographic infrastructure and funding availability in each region, for the simultaneous implementation of 2D and 3D property registration, based on a Mobile Cloud Computing (MCC) architecture, is proposed. A Database Management System (DBMS) based on the Land Administration Domain Model (LADM) standard is used for the management and storage of the collected data, while a prototype open-source mobile application for the collection of 2D and 3D crowdsourced cadastral data, the automatic 3D modelling and visualization of 3D property units as block models (LoD1) on a mobile’s phone screen in real-time is developed. A case study for a multi-storey building in an urban area of Athens, Greece, is presented. The first results seem to be interesting and promising. A Strengths, Weaknesses, Opportunities, and Threats (SWOT) assessment of the proposed framework, is conducted. The main conclusions referred to the potential and the perspectives of the proposed technical crowdsourced solution for the initial registration for the implementation of a Fit-For-Purpose 3D cadastral system are presented.

A BIM-IFC Technical Solution for 3D Crowdsourced Cadastral Surveys Based on LADM

“…The reliability of the collected data is also strengthened through active co-operation between professionals and citizens. Professional surveyors, e-training videos, or even a trained volunteer in the role of a team leader may be responsible for assisting with the overall data collection procedure and helping the citizen/rights holder to overcome any difficulty regarding the process or the use of the software [2,51,54]. It is noted that the main objective of the proposed framework is to provide an up-to-date LADM-based cadastral database.…”

“…Traditional 2D cadastral systems cannot fully represent and visualize the spatial information, providing an incomplete illustration of the structures and space usages of complex buildings both above and below the ground. The on-going dominance of such limitations jeopardizes citizens' proprietary rights, restrictions, and responsibilities (RRRs) and complicates the valuation, taxation, planning, and control of land use and natural resources [1,2]. Traditional cadastral systems require the necessary legal, institutional, and technical adjustments to be able to cope with the multidimensional environment.…”