3D Mesh in LUUCY and icRoom for the City of Liestal
3D mesh for urban planning in Liestal. Thanks to a custom LOD workflow, the model runs live at 60 fps in the icRoom projection.
Project data
About this project
For its urban planning, the city of Liestal wanted an up-to-date, detailed 3D model of the entire urban area. The data was to serve as a common basis for planning its districts.
Using a helicopter, we captured the 6.65 km² area with nadir and oblique imagery (photos taken straight down and at an angle toward the facades). In total, more than 10,000 images were captured at a resolution of 3 cm per pixel. This means that one pixel in the orthophoto covers a square measuring 3 cm on each side in the real world.
From this imagery we computed a textured 3D mesh, prepared in tiles of varying edge length and multiple LOD levels (detail levels that load depending on viewing distance). For the icRoom by Inside Reality (a projection that turns three walls of a room into a single image using multiple projectors), we developed a dedicated workflow together with the manufacturer.
The triangle count was optimized, and the surfaces were then split by slope into roofs and streets, facades, and undersides. Each group received textures at the appropriate resolution, allowing the model to run live in the icRoom at 60 frames per second. The workflow can now be applied to project areas of any size. For a part of the urban area, we also computed Gaussian Splats (photorealistic 3D scenes derived from the aerial images) from the same data.
For the Sichtern district, we additionally created a Cesium tileset (a web format for streaming 3D data), connected to the platform LUUCY. Planning in LUUCY is done by an external planning team. The volumes designed there are sent directly to the icRoom at the push of a button, via a new interface between the two platforms.
The city of Liestal uses the data to plan its districts and reviews proposals directly in the photorealistic model, room-filling in the icRoom.
Using a helicopter, we captured the 6.65 km² area with nadir and oblique imagery (photos taken straight down and at an angle toward the facades). In total, more than 10,000 images were captured at a resolution of 3 cm per pixel. This means that one pixel in the orthophoto covers a square measuring 3 cm on each side in the real world.
From this imagery we computed a textured 3D mesh, prepared in tiles of varying edge length and multiple LOD levels (detail levels that load depending on viewing distance). For the icRoom by Inside Reality (a projection that turns three walls of a room into a single image using multiple projectors), we developed a dedicated workflow together with the manufacturer.
The triangle count was optimized, and the surfaces were then split by slope into roofs and streets, facades, and undersides. Each group received textures at the appropriate resolution, allowing the model to run live in the icRoom at 60 frames per second. The workflow can now be applied to project areas of any size. For a part of the urban area, we also computed Gaussian Splats (photorealistic 3D scenes derived from the aerial images) from the same data.
For the Sichtern district, we additionally created a Cesium tileset (a web format for streaming 3D data), connected to the platform LUUCY. Planning in LUUCY is done by an external planning team. The volumes designed there are sent directly to the icRoom at the push of a button, via a new interface between the two platforms.
The city of Liestal uses the data to plan its districts and reviews proposals directly in the photorealistic model, room-filling in the icRoom.
Key figures
Area
6.65 km²
Resolution
3 cm/px
Images
>10,000
Image gallery
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