For this exercise we can use different open data sources like the CityGML dataset from New York City or from the German federal State North Rhine-Westphalia:
- NYC mixed LOD1 and LOD2 buildings
- North Rhine-Westphalia buildings aggregated per municipality or city in LOD 1 or 2
- North Rhine-Westphalia aggregated according to predefined tiles in LOD 1 or 2
The size of the dataset can influence the time for downloading, processing in FME and hosting for the viewer, maybe choose a smaller dataset for the start.