1. CityGRID 2009
Intelligent 3D data management
June 2010

2. Session 4: Visualisation of Place
What does ‘realistic’ mean?
The issues relating to defining the accuracy of 3D
digital representation of a place.

3. “Is a national 3D data set a solution looking for a
problem?” 26th May 2010 @ #ospe
John Carpenter, Head of Product Management
Ordnance Survey

4. Source: Flickr / Digitalpimp

5. Source: Flickr / I Like

6. Source: Flickr / Ed Yourdon

7. Source: Flickr / Wonderlane

8. Source: Met Geo Info / City of Linz

9. Source: PB / Eberhard

10. Source: Flickr / DavidChief

11. 3D Good / 2D Bad?

12. • To improve decision making, and
• To save time and money in the decision making
process
– Information management
– Conservation
– Urban planning
– Public consultation

13. Information Management

14. Conservation

15. Urban Planning

16. Public Consultation

17. Public Consultation

18. Public Consultation

19. Public Consultation

20. Public Consultation
• Solid models:

21. Source: Met Geo Info / City of Zagreb

22. Source: Flickr / Laineys Repetoire

23. Position
Source: Flickr / Betenoir

24. Geometry
Source: Flickr / Salvadhor

25. Texture
Source: Flickr / Miss Tessmacher

26. Source: Met Geo Info / City of Glasgow

27. Source: C3 Technologies / City of Vas

28. Source: C3 Technologies / City of Vas

29. Source: Flickr / Olivander

30. • CityGML v.1.0 (August 2008)
• OGC Standard
• Developed & promoted by the 3DSIG

31. Level of Detail (LoD):
LoD 1
3
2

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

34. • CityGML v.1.0 (August 2008)
• OGC Standard
• Developed & promoted by the 3DSIG
• Globally adopted?
– IFC (BuildingSMART)
– Integration with BIM

36. Michael Schlosser
(Geospatial Technical Specialist Autodesk)
• “..3D GIS is about making it easier for the users
of the information and not the CAD and GIS
gurus.
• “..It’s about an easier way to analyze, visualize
and communicate information about our 3D
world.”

37. @rollohome