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
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
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
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
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
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