Cornel & Cornel Topoexim

13/06/2026

LADM Colombia: A Model-Driven Ecosystem for Decision-Oriented Territorial Digital Twins toward LADM II
Golgi ALVAREZ, Colombia, David FRIEDRICH and Jörg WERTLI, Switzerland

The technology industry is advancing irreversibly toward digital twins that integrate data, workflows, and service within unified territorial environments. Platform alliances and convergences clearly illustrate this trend: Autodesk + Esri connect BIM design with operational GIS; Hexagon integrates data capture, modeling, and geospatial/industrial analytics; Bentley Systems / Siemens orchestrate infrastructure life cycles through connected engineering.
However, this technological convergence has also generated conceptual ambiguities,
particularly between information systems, digital architectures, and digital twins in the strict sense, as well as between infrastructure-centered decisions and decisions of a territorial nature.
Even so, this momentum is driving the dismantling of silos between cadastre, land registration, planning, infrastructure, and public services, enabling traceable decisions in (near) real time and frictionless interaction across domains.
Alongside technological supply, public-sector demand requires modernization based on shared rules. Standards thus become the balance between innovation and governance, and LADM stands as the most robust example in land administration. Its Version II expands the scope beyond the traditional cadastre – registration binomial, encompassing marine and coastal contexts, spatial planning, valuation, and infrastructure, through semantics and profiles that foster semantic and transactional interoperability across levels of government and sectors. This approach is essential to prioritize territorial decisions—related to rights, restrictions, and responsibilities—grounded in regulated territorial entities, which are not covered by infrastructure-only models but nonetheless require convergence with them at clearly defined points.
Within this context, Colombia is advancing a model-driven architecture (Model Driven Architecture, MDA) that, ahead of LADM II, organizes a conceptual core (LADM_COL) and thematic extended models for spatial planning, environment, mining, and other domains. This approach—supported by more than a decade of Swiss cooperation and the BSF-Swissphoto partnership—has resulted in a documented Land Administration System (LAS), published good practices, and a culture of interoperability, traceability, and citizen-oriented service; an appropriate foundation for evolving from information platforms toward decision-oriented territorial digital twins.

The challenge now is to balance standards and technological adoption with convergence in service of human, social, economic, and environmental development. This is not about “following the digital trend,” nor about confusing digital twins with data repositories or software solutions, but about ensuring that LADM models, their extensions, and model-driven architectures enable better-informed, traceable public decisions, coherent with legal and administrative frameworks governing infrastructure, cities, and countries, while promoting transparency, territorial equity, and continuous improvement. In this sense, the need emerges for conceptual frameworks capable of positioning standards such as LADM II within broader ecosystems of domains, layers, and processes-where land administration goes beyond information management and becomes articulated with effective operation and decision-making in integrated digital environments.

FIG Congress 2026, The Future We Want - The SDGs and Beyond, Cape Town, South Africa, 24–29 May 2026



Read full article:https://www.fig.net/resources/proceedings/fig_proceedings/fig2026/papers/ts05h/TS05H_golgi_wertli_13845.pdf

12/06/2026

Kinematic terrestrial laser scanning of the River Thames
Documenting bridges and other riverside features in a dynamic environment
By Wim van Wegen

A kinematic scanning project carried out on the River Thames in London, UK, has demonstrated the advantages of mobile mapping under real-world conditions within a limited time frame. Operating from a launch vessel, the survey covered a 12km stretch between Tower Bridge and Lambeth Bridge, capturing high-density laser data in radar mode. The project provided valuable insight into trajectory calculation, data quality and overall system performance in a dynamic river environment with constant vessel movement and variable GNSS conditions.
In terms of versatility, the RIEGL VZ-600i 3D terrestrial laser scanner offers four laser pulse speeds (measurement modes) which cover up to 1,000m of ranging capabilities. "This unique combination delivers a 6mm-resolution-at-10m scan – or, in long-range scanning, 600mm at 1,000m – in 25 seconds of scan time. With time for initialization and pose calculations in real-world applications, this translates into the potential for a scan position per minute, or better," explains Dave Foster, managing director of RIEGL UK.

• Onboard registration
• Rapid project setup
• Reliable GNSS information and high-resolution images
• Smooth processing
• High-accuracy measurement data from hard-to-reach spots

Foster looks back on the demo with satisfaction. “Data quality, despite only being captured in radar mode, was high. We can only surmise what it would have been had we been able to complete another pass in line scan mode,” he states.
“RTK fluctuations between fixed, float and single meant that processing took a little longer than might have been originally anticipated. The fact that the survey was able to be processed so well was a testament to the robust nature of the processes within RiSCAN PRO to bring the trajectory paths together,” he continues.
“Due to the tight schedule, that was not possible for this project. Nevertheless, the team proved the capabilities of the scanner for kinematic data acquisition and thus its real versatility and highest efficiency for a maximum of applications,” concludes Foster.

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A kinematic scanning project carried out on the River Thames in London, UK, has demonstrated the advantages of mobile mapping under real-world conditi...

11/06/2026

COMPARISON STUDY BETWEEN A CONCRETE FRAME STRUCTURE AND A MASONRY STRUCTURE FOR A FIVE-STOREY BUILDING
Mircea Răzvan MEREA, Simon Alexandru PESCARI, Valeriu-Augustin STOIAN, Clara-Beatrice VÎLCEANU

The current study focuses on the structure cost and the energy efficiency for a five-storey building located in Timisoara, Romania.
A cost comparison and the energy demand between two types of structures was concluded, namely a concrete structure and a masonry structure.
The study focuses only on the building’s structure because the building’s finishes and
the installation are the same for both cases.
Regarding the energy efficiency, the difference appears for the exterior walls, in the first case, for the concrete structure building the walls are realized with autoclaved cellular concrete (ACC) and in the second case for the masonry structure the exterior walls are realized with brick masonry.
The walls insulation is the same in both cases.

The study presents a cost comparison between two structural solutions for a residential building, the first one is by using reinforced concrete frames for the structure, and the walls are realized with autoclaved cellular concrete (ACC) and the second solution is by using masonry walls for the structure, and the walls are realized using bricks with gaps.
The study shows that when choosing a reinforced concrete frame structure, the cost is significantly higher that a masonry wall structure and the investment does not pay off after a 20-year period.
The study is realized for a four-floor building, which is the maximum number of floors for the chosen zone in Romania, according to the national Normative.

Key words: cost comparison, frame structure, masonry structure.

Read full article :https://www.landreclamationjournal.usamv.ro/pdf/2023/Art62.pdf

10/06/2026

TVR Cultural
Muzeul Hărților

"Cum arată România, văzută prin 700 de milioane de coordonate?
Răspunsul vine de la Muzeul Hărților din București, unde s-a deschis o expoziție spectaculoasă, construită din date geodezice reale.
Artistul Miluță Flueraș a transformat opt ani de măsurători și informații obținute prin tehnologii de poziționare geospațială în lucrări de artă. Acestea dezvăluie ritmul ascuns al orașelor, traseele invizibile ale teritoriului românesc și o nouă formă de cartografiere, aflată la granița dintre știință și artă.

Jurnalist: Radu Dumitrache
Imaginea: Gabriel Borta

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https://www.facebook.com/share/v/1Avsy4NLUF/

09/06/2026

Study on the Evolution of the Displacement and Deformation of the Surface Produced by the Exploitation of Iron Deposits in the Mining Perimeter of Ghelari, Hunedoara County, Romania
Ioan VOINA, George Emanuel VOICU, Florina VOICU

The mining activities for the exploitation of the iron deposits often lead to massive deformation and displacement of rocks, with major consequences on the civil and industrial buildings on the surface, sometimes even including the loss of human lives.
The mining activity in the research area have had in time a series of negative effects on the soil and human settlements. The first manifestations of the deformation were the appearance of cracks in the monumental building of the Orthodox Church of Ghelari, as well as to some houses in the influence area of the mining exploitation.
The great degradation in the perimeter of Ghelari is well-known. In time, a series of submergence of the land due to the mining activities was signalled.
The present paper intends to present a study on the character and the amplitude of the phenomenon of mining subsidence as a result of the anthropic activity mentioned above.

The evolution of the displacement and deformation of the land depends on the parameters specific to the deposit, the types of rocks met during the excavation, which are factors revealing a unique behaviour for each type of mining exploitation.
The study of the influence of the underground exploitation is necessary to highlight the movement and to establish the safety measures for the constructions at the surface and for the surface itself.

Keywords: monitoring, parameters, subsidence, topography.



“1 Decembrie 1918” University of Alba Iulia, RevCAD 28/2020

Read full article :http://revcad.uab.ro/upload/49_777_voina_voicu_voicu.pdf

08/06/2026

🌍 From Cape Town to the World – United the Global Surveying and Geospatial Community

What an incredible achievement!
FIG Congress 2026 welcomed 1,479 paid delegates from 87 countries to Cape Town, demonstrating the truly global reach and impact of the surveying, geospatial, land administration, and built environment professions.
From Africa, Asia, Europe, the Americas, and Oceania, delegates gathered to share knowledge, build partnerships, and shape the future of our industry under the theme "The Future We Want – The SDGs and Beyond”.

Cape Town proudly served as the meeting place where ideas, innovation, and collaboration came together to advance geospatial excellence for a better living.

Thank you to every delegate, speaker, exhibitor, sponsor, and partner who made FIG Congress a resounding success. Together, we showcased the power of global collaboration and the strength of our international community.

08/06/2026

Optimising longhole open stoping design using geospatial techniques: a case study from Ghana
Saviour MANTEY, Obed Gyamfi AMPONSAH, Isaac Selasi Kojo ATTIPOE

Underground mining is a critical process for extracting mineral resources from deep within the earth, requiring meticulous planning and design to ensure operational efficiency and safety.
Traditional LHOS design often relies on empirical methods, which may not fully utilise geological data or optimise for economic and geotechnical constraints.
This study aimed to evaluate the application and effectiveness of integrated geospatial techniques in optimising the LHOS design for a steeply dipping gold orebody in Ghana.
The study objectives were achieved through a comprehensive approach that included a literature review of related works, the application of a mineable stope optimiser, the design of underground infrastructure, the installation of lasers for drive development, and the reporting of material volume and dilution.
The block model was employed to generate mineable stopes, with the underground mine design extending across seven levels, each spaced 25 m apart. The design strategically left stopes above the second level (125 mRL) as unmined pillars for stability.
Key infrastructure elements included a ventilation and hoisting shaft, two internal ramps, crosscuts, footwall drives, and ore drives.
Open stoping operations were planned to commence on the second level, retreating towards the footwall drive, with ore being tipped into a nearby ore pass for hoisting. Implementation utilised geospatial techniques, with lasers installed to guide drive development and ensure accuracy. Analysis of the optimised design indicated a Life of Mine (LoM) of 15 years, with projected material movement detailed.
The workflow demonstrated how geospatial tools can enhance precision in stope layout and infrastructure planning.
This study underscores the importance of precise engineering in the successful exploitation of deep-seated mineral resources.

Keywords: Datamine, Deswik, geospatial techniques, Longhole open stoping, underground mining

Nova Geodesia, Vol. 6 No. 1 (2026)

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Optimising longhole open stoping design using geospatial techniques: a case study from Ghana Authors Saviour MANTEY University of Mines and Technology, Department of Geomatic Engineering, P.O. Box 237, Tarkwa (GH) https://orcid.org/0000-0002-8210-3577 Obed Gyamfi AMPONSAH University of Mines and Tec...

07/06/2026

Leveraging High-Frequency UAV–LiDAR Surveys to Monitor Earthflow Dynamics—The Baldiola Landslide Case Study
Francesco Lelli, Marco Mulas, Vincenzo Critelli, Cecilia Fabbiani, Melissa Tondo, Marco Aleotti,Alessandro Corsini

UAV platforms equipped with RTK positioning and LiDAR sensors are increasingly used for landslide monitoring, offering frequent, high-resolution surveys with broad spatial coverage.
In this study, we applied high-frequency UAV-based monitoring to the active Baldiola earthflow (Northern Apennines, Italy), integrating 10 UAV–LiDAR and photogrammetric surveys, acquired at average intervals of 14 days over a four-month period.
UAV-derived orthophotos and DEMs supported displacement analysis through homologous point tracking (HPT), with robotic total station measurements serving as ground-truth data for validation.
DEMs were also used for multi-temporal DEM of Difference (DoD) analysis to assess elevation changes and identify depletion and accumulation patterns.
Displacement trends derived from HPT showed strong agreement with RTS data in both horizontal (R2 = 0.98) and vertical (R2 = 0.94) components, with cumulative displacements ranging from 2 m to over 40 m between April and August 2024. DoD analysis further supported the interpretation of slope processes, revealing sector-specific reactivations and material redistribution.
UAV-based monitoring provided accurate displacement measurements, operational flexibility, and spatially complete datasets, supporting its use as a reliable and scalable tool for landslide analysis.
The results support its potential as a stand-alone solution for both monitoring and emergency response applications.

Keywords: UAV; LiDAR; monitoring; remote sensing; landslide; earthflow; homologous point tracking; DEM of difference; robotic total station; Northern Apennine

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UAV platforms equipped with RTK positioning and LiDAR sensors are increasingly used for landslide monitoring, offering frequent, high-resolution surveys with broad spatial coverage. In this study, we applied high-frequency UAV-based monitoring to the active Baldiola earthflow (Northern Apennines, It...

06/06/2026

ISO19152-LADM-Osaka- Naniwa capital (645AD) 3D cadastral mapping
Hiroyuki HASEGAWA, Naofumi KISHIMOTO, Erdoo Paula, Marin ODAHARA

Consistency of the Japanese cadastral system, from Osaka-Naniwa capital - JohRi land administration(645 AD.) to the current land registration, has been supported by modern maps (since 1880s) and aerial photos (since 1928) in Osaka, Japan, as national standard.
The most pressing issue is the Japanese cadastral system and 3D cadastral map creation for Nankai Trough mega-earthquake and storm surge countermeasures in Osaka Bay area.
Based on the accuracy of 1cm on the ground by GNSS geodetic networking, we could establish 3D cadastral mapping, proceeding to helicopter/ drone photogrammetry by bundle triangulation for 3D image modeling and diorama designing of urban area 3D modeling, using non glasses 3D display, to build consensus among landowners in land registration process.
4D-IMADAS (Image Map Archive Designed Aerial Studies) covers the total process of 3D
mapping, based on Geocentric GNSS Geodetic networking, combined single-stroke TS/TLS surveying and authentic photogrammetry with bundle triangulation and satellite photogrammetry, as the basis for 3D cadastral mapping. Aerial photography is reconstructed as 3D image models on digital stereo plotter for Cadastral mapping, to ensure the title of land registration with historical reality of land property.
Proposal of ISO19152-LADM for 3D cadastral maps could be well prepared, showing the achievements from Osaka 3D cadastral mapping works.

Key words: ISO19152-LADM, Osaka-Naniwa capital, 3D cadastral mapping, JohRi Land Administration, Agrarian reform arable land arrangement

FIG Congress 2026, The Future We Want - The SDGs and Beyond, Cape Town, South Africa, 24–29 May 2026



Read full article:https://www.fig.net/resources/proceedings/fig_proceedings/fig2026/papers/ts05h/TS05H_odahara_hasegawa_et_al_13823.pdf

05/06/2026