The document discusses CityGRID, a 3D data management system for cities. CityGRID allows cities to create detailed 3D models (LOD 1-3) to improve decision making and save money. It provides tools to create, manage, visualize and analyze city models. CityGRID stores models as a structured line-based database for indexing, transactions, security and version control of building data. It enables efficient information management, conservation, urban planning and public consultation using cities' 3D models.

1. January 2009 CityGRID 2009 Intelligent 3D data management

4. City Modelling: What is it?

6. City Modelling: What is it? ◄ Point Cloud Data from a terrestrial laser scanner incorporated into a model ▼ Biometric 3DS objects used to represent proposed planting scheme

7. City Modelling: What is it?

9. City Modelling: Why? Information Management

10. City Modelling: Why? Conservation

11. City Modelling: Why? Urban Planning 1

12. City Modelling: Why? Urban Planning 2

13. City Modelling: Why? Urban Planning 3

14. City Modelling: Why? Urban Planning 4

15. City Modelling: Why? Public Consultation 1

16. City Modelling: Why? Public Consultation 2

17. City Modelling: Why? Public Consultation 3

18. City Modelling: Why?

22. CityGRID: What is it? CityGRID Manager CityGRID Modeler CityGRID Planner CityGRID Explorer

23. CityGRID: Modeler CityGRID Modeler

24. CityGRID: Planner CityGRID Planner

25. CityGRID: Explorer CityGRID Explorer

26. CityGRID: Manager CityGRID Modeler CityGRID Planner CityGRID Explorer CityGRID Manager

28. CityGRID: The advantages 2 Off-the-shelf model: faces CityGRID: line model CityGRID: faces generated on the fly

29. CityGRID Manager model structure Input line structure Corresponding 3D Model CityGRID: The advantages 3

30. CityGRID: The advantages 4 CityGRID Modeler tool:

34. LoD 1 LoD 2 LoD 3 The Logic of CityGRID 1 Level of Detail (LoD):

35. The Logic of CityGRID 2 LOD: Scalable solutions according need Application: Data Source: Topographic mapping Aerial photogrammetry or airborne laser scanning LoD 1.5 Generalised Roof Model LoD 1 Block Model LoD 2 Roof Model LoD 3 Detailed Roof Model LoD 4 Interiors Aerial photogrammetry or airborne laser scanning Detailed aerial photogrammetry Façade photographs and 3D TLS of complex buildings Construction plans or surveying Noise protection, large area city planning Local area city planning, project development Project development, architectural documentation, cultural heritage. Homeland security, asset management

36. The Logic of CityGRID 3 Levels of hierarchy of a City GRID building Unit Object 2 Object 1 Object 3 Detail element complex Main element complex facade roof

37. The Logic of CityGRID 4 Units, Objects and Elements:

38. The Logic of CityGRID 5 Historical versions:

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