![]() This type of 3D city modeling approach and building typology follows what is known as the CityGML schema. ![]() Instead of just drawing two-dimensional polygons, the Helsinki model represents buildings in two levels of 3D geometry (or LOD for level of detail): from simple flat-roofed cubes (LOD1) to more complex shapes that characterize irregular roof surfaces (LOD2). The way the data is stored also plays a vital part. But merely collecting a remarkable amount of digital data, including some 50,000 oblique aerial photographs, is not enough to carry out the impressive simulations at the scale accomplished by Helsinki. Other pilot projects that exploit this virtual 3D model are currently on-going, including the creation of a fully-connected digital twin city in Helsinki’s harbor district of Kalasatama.Īs a representation of Helsinki’s built environment, its city information model is a rich digital rendition of the various layers and components that can be found in a thriving urban landscape. And as the simulated results are displayed in richly-detailed 3D images, the model’s creators expect that their citizens will use this virtual urban replica to effectively work together with architects, engineers, and utility companies in finding ways to implement feasible energy-saving solutions. The results of the 3D simulations, viewable in the same online platform, unravel not only which buildings in the city have higher than usual energy consumption, but also when. ![]() Helsinki (the Helsinki Cathedral in the center) is one of the first European cities to have a completed a virtual 3D city model. Using the same 3D model, they simulated the city’s seasonal heating requirements by linking into Helsinki’s broad building registry system and its ample weather data. And because simulations in virtual 3D models can be used to recreate how natural events affect urban spaces, the planners were able to go even further in their examination. The aim of this web-based mapping platform is to uncover the heating, electricity, and water consumption data of every building in the city. Nowadays, it is being used in more advanced urban analyses to simulate real-world processes as well as to evaluate “what-if” scenarios.įor example, to support the citywide strategy to create a carbon-neutral capital by 2035, the city planners of Helsinki turned to their virtual 3D city model and built for themselves a fully digital energy and climate atlas. The Finns simply call it their city information model, and it continues to be a convenient desktop tool for exploring the capital’s built assets since it went live online in 2016 (). Inset: Virtual 3D city models are the building blocks of future smart cities. From a few hand-drawn edifices using computer-aided design (CAD) in the late 1980s, it has now grown into a full-scale digital city that covers some 400 square kilometers (154 square miles), all thanks to the clever combination of techniques in mapping and computer modeling, as well as aerial photography and laser scanning.Īn aerial view of a New York City-inspired 3D city with skyscrapers, water, and bridges. Developed under various urban design projects spanning three decades, the evolution of Helsinki’s digital 3D replica is also a reflection of the progress in architectural and geospatial technologies. That’s because there is a strong design legacy behind its 3D creation. Helsinki is proud to be one of the first European cities to have completed a publicly accessible 3D city model, and quite rightly so. This is the digital doppelganger of Finland’s capital, viewable to anyone with Internet access and freely downloadable to all. Take a peek at Helsinki’s virtual 3D city model and what might at first seem to be just rows of solid objects soon reveal themselves as handsome blocks of buildings that line gridiron streets. Cutting-edge 3D city models lead the way to better urban planning via digital simulation
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