Digital Twin City 3D
A Digital Twin prototype combining CityGML/CityJSON with 3D Tiles (photogrammetry, point clouds) and individual 3D models in one web platform.
Context
Cities and districts need a 3D digital representation for planning, simulation, and decision-making. We built a Digital Twin City prototype that renders an urban environment in 3D directly in the browser, with no specialized software required.
What We Built
We combined CityGML/CityJSON city models with 3D Tiles from photogrammetry and point clouds, plus individual building models (GLB/KMZ). Everything is served through a CesiumJS-based web platform capable of efficiently streaming large 3D datasets.
Key Features
- Interactive 3D navigation (pan, zoom, orbit) in the browser.
- Integration of photogrammetry, point clouds, and individual 3D models.
- 3D Tiles streaming for large datasets without overloading devices.
Results & Impact
The current demo uses data from Kalasatama, Helsinki, to show the maturity of the approach. The approach is ready for city governments, industrial estates, and developers.
