UAV + SURVEYING
Channel Sponsor: Bentley Systems | www.bentley.com
Helsinki used Bentley applications to create a reality mesh and a CityGML intelligent model of the city.
As part of a three-year initiative, Helsinki launched the €1 billion undertaking to capture city assets and create rich 3D city models of the current infrastructure that could be shared with internal and external stakeholders, as well as the public, and showcase the power of reality modeling through a collection of pilot projects. Known as Helsinki 3D+, the project required surveying more than 500 square kilometers, mapping more than 600 ground control points, and managing and sharing large amounts of data. To meet these challenges and deliver accurate city models within the prescribed period and budget, Helsinki required integrated, comprehensive reality modeling and information Helsinki used Bentley’s reality modeling technology for geo- coordination, optioneering, modeling, and visualization. The team produced large-scale base maps and geo-coordinated utility networks with Bentley Map. Using a combination of LiDAR laser scanning and oblique photogrammetry, they gathered terrain and surface data, and captured more than 50,000 images of the city and surrounding islands, comprising 11 terabytes of data. management capabilities. Integrated applications The project team relied on Pointools to process the point clouds obtained via laser scanning to generate the digital terrain model (DTM), and they used Descartes to integrate the oblique and orthophotographic
A new generation of city models Helsinki creates 3D city models to promote commercial research and development. By Chintana Herrin
Helsinki, Finland’s capital and regional center, is experiencing booming development and a growing urban population of more than 600,000. Helsinki has a long tradition of 3D city modeling starting in the mid- 1980s. To support city growth, promote digital city initiatives, enable new commercial ventures, and implement programs with university partners, Helsinki developed a new 3D representation of the entire city using advanced modeling technologies. “The first models of Helsinki were made in 1985,” said Project Manager Jarmo Suomisto. “Lots of people worked with them and we are continuing this heritage. Our project is delivering a new generation of city models to Helsinki.”
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csengineermag.com
april 2018
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