1. Open 2.5D maps: concepts and rendering pipeline Vladimir Elistratov github.com/vvoovv

2. Tartu, 1910, Pharus Publishing House, Berlin

5. 3D model: Saint Basil's Cathedral Author: Enrico Dalbosco aka Arrigo Silva http://www.enricodalbosco.it http://arrigosilva.blogspot.com

6. 2.5D maps production in a nutshell 3D models render models in oblique projection perform georeferencing

7. Oblique projection Projection direction Viewing plane is parallel to building floor Projection angle Angles between edges of a 2D building outline and relative sizes of the edges are preserved!

8. 2.5D maps 2.5D maps can be used for historical maps as well

9. 2.5D maps: Easy Real 3D Maps Easy: ● No need to take heights into account ● Key city landmarks only are enough ● No need to render city details: trees, street lights, public transport stops, etc

10. 2.5D maps: Easy Real 3D Maps Real 3D: ● Based on actual 3D building models ● Provides realistic apperance unlike maps.f4-group.com

11. 2.5D maps production in a nutshell 3D models render models in oblique projection perform georeferencing

12. Free 3D modelling software ● Sketchup (close source, limitations for the free version) ● Blender (open source)

13. Format for 3D models Collada: ● XML based ● used by Google Earth

14. Rendering software ● POV-Ray ● Blender

15. Converter from Collada to POV-Ray Converter from Collada to POV-Ray has been created

16. Oblique projection Projection direction Viewing plane is parallel to building floor Projection angle

18. Different projection angles

19. Different textures

23. Expressive rendering (postprocessing)

25. Georeferencing and Rendering with Mapnik ● Use a 2D building outline and simple math to find correspondence between a number of projected points and their geographical coordinates ● Use GDAL library to created a GeoTiff ● Render GeoTiff images and normal 2D map with Mapnik

26. Vision: distributed repository of 3D models Table of links to actual locations of 3D models 3D model github.com 3D model docs.google.co m 3D model dropbox.com