Building Blocks: this is basically a row of rectangular buildings (canonically blockshaped).
-- Additional parameters:

1. superbuildings (a building complex)
2. number of buildings
3. average height of building
4. variation in height
5. averate size of building
6. variation in size
7. texture details
8. explicit building that must be imported from elsewhere (e.g. important landmarks like ESB)
9. variations from block shaped buildings
10. commercial/residential/mixed
11. vacant lots
12. passageways