I am a GIS Software Engineer working as a PhD researcher in the 3D geoinformation group of TU Delft.
Can we visualize a data set of millions of buildings smoothly even on mobile devices? Turns out we can! 3D BAG is a data set containing all buildings in the Netherlands in 3D and we built a viewer to allow users to see it through their browser. This is how we utilized 3D Tiles and three.js to build a viewer from scratch with the main focus on efficiency and the data itself.
This is a presentation about CityJSON and the variety of open source tools that are available around it. CityJSON is a file format that can be used to exchange 3D city models. The talk will review certain applications that can be based on CityJSON but will mainly focus mainly on ninja, the QGIS plugin and the Blender plugin.