GAFFTA Visualizing and Mapping Data, Day Three

Transcript

1. Visualizing and Mapping Data Michal Migurski & Shawn Allen, Stamen

   Design GAFFTA February 2012 http://sta.mn/vvg

2. Day Three: Cartography

3. None

4. sta.mn/pm

5. sta.mn/mf

6. mapy.cz

7. sta.mn/k8

8. http://sta.mn/mj

9. http://sta.mn/mj

10. http://sta.mn/xt

11. http://sta.mn/xt

12. None

13. Projection Flattening the globe onto a flat screen

14. Latitude, Longitude

15. A sphere tears when you flatten it

16. http://sta.mn/y9p There are interesting ways to tear spheres

17. http://xkcd.com/977

18. None

19. Projections usually have a home

20. http://sta.mn/tw3 Projections are usually designed for paper

21. http://sta.mn/59m Surveyors usually prefer cartesian math

22. Three example ways to categorize projections…

23. Azimuthal Preserves direction

24. Equal-Area Preserves area

25. Conformal Preserves local shapes

26. Spherical Mercator is ubiquitous on the web—why?

27. One notable interesting way to tear a sphere

28. None

29. http://sta.mn/y9p

30. http://sta.mn/24j

31. Scale How big is your map?

32. This is not “scale”

33. Scale is an idea imported from print

34. Choose the right content at different scales

35. Four maps, same area

36. Generalizing shapes

37. http://sta.mn/y2d Shapes change at different scales

38. Data Where data for maps comes from

39. Natural Earth Data naturalearthdata.com

40. …for small to medium scales

41. OpenStreetMap openstreetmap.org

42. http://sta.mn/kk …for large scales…

43. http://sta.mn/66 …and things mapped by no one else.

44. http://sta.mn/vc

45. http://sta.mn/fy

46. None
47. None
48. None

49. Nodes, Ways

50. Tags “You can use any tags you like as long

    as the values are verifiable. However, there is a benefit in agreeing to a recommended set of features and corresponding tags.” — http://sta.mn/st

51. http://sta.mn/j9

52. Follow along… http://sta.mn/vvg