Geospatial

OpenStreetMap

• Quadtree grid
  
• level 18 tiles (100x100m Europe - 150x150 Equator)
  
• 64 billion tiles
  
• recursive method from highest layer to the lowest
  
• data aggregated to level-15 tiles
  

Global Human Settlement Layer

• raster-based data
• raster files were vectorized to be used from others
• GOB can be better, GHSL overestimates built up area

Microsoft Building Footprints

• missing data consistently, even in a city there are well covered areas and missing areas
• todo

Google Open Buildings

• todo
• todo