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3D is the way to go for urban planning

Hyderabad: Over the past decade there has been a tremendous increase in demand for 3D modelling of cities and infrastructure and 3D city models have become an integral base for building and planning cities around the globe.

In keeping with the trend, the session on 3D Modelling on the second day of the India Geospatial Forum here saw experts and speakers underlining the use of this evolving technology in various fields.

Highlighting the advantages of digital representation of building models in eradicating costly mistakes and reducing unforeseen changes during actual design and construction phases, Nirmalya Chatterjee, COO & Director, Tekla India & India Manager, Trimble Buildings, said with more and more planning and design tasks being executed digitally, an incredibly rich set of information was getting embedded in a 3D model with contribution from multiple stakeholders of a project. This ‘as-built’ 3D project model approach is essentially helpful in meeting quality deliverable on time and executing it without much errors and reworks. From the start to the end of the ‘design, build and operate’ lifecycle, these digital/ BIM models held immense value to each and every stakeholder in building construction, he added.

Talking about intelligent use of Big Data in sustainable infrastructure design, Partha Sarkar, Senior Developer Consultant, Autodesk India, said increasing population, limited resources and multiple constraints are the growing challenges for infrastructure projects. The answer to this lay in crunching the available Big Data to build our next-generation infrastructure that would be clean, green and sustainable, he said. Collaborating and sharing of 3D models on clouds between various stakeholders of a project increases productivity, efficiency and transparency and reduces cost.

Hannu Korpela of Terrasolid explained how airborne LiDAR and images are an excellent data source to build 3D city models. The advantage compared to any other means of survey is that one can atomise the data processing, which means that the models can be very easily upgraded immediately after operation. By comparing the old and new models, one can easily monitor the changes in urban environment. Korpela, who heads marketing and sales with the Finland-based company, underlined that the most important use of this technology could be in urban and infrastructure planning. The city model could even be the first step towards creating a land register in many developing nations. Korpela ended his talk with open-ended question – there are many exciting possibilities in this field, but when will India open up to this?

Christoph Furst, Assistant, International Sales, Riegl Laser Measurement Systems, talked of post-processing of laser scanning data in urban and mining environments. In the recent years, 3D laser scanning has become a valuable tool with ever-improving quality of results. He gave examples of how terrestrial laser scanners were used in a wide variety of applications such as mining, architecture, civil engineering, forensics and many more. 3D scanners can reach a height of up to 6,000 metres now and the resolution has also increased significantly due to finer measurement rates. Furst brought out two factors that offer potential for improvement – overall productivity and efficiency, which are getting possible with new-age scanners.

Source: Our correspondent