Issues of Scale Using C o l o r

1. Issues of ScaleUsing Color

2. Scale Issues

3. What is map scale? The scale of a map is the relationship between a unit of length on the map and a unit of length on the ground.

4. Map Scales Verbal scale “One cm represents 100 km” Bar scales (graphical) Representative fraction (RF) 1:24,000

5. Representative Fraction A 0.025 inch line on a1:24,000scale map represents50ft (600 in) on the ground A 0.025 inch line on a1:200,000scale map represents almost417ft on the ground

6. Scale Issues Beware of scale statements 1:200 (“one to two hundred”) does this mean unit-to-unit (one inch on the map equals 200 inches on the ground) or not unit-to-unit (one inch on the map equals 200 feet on the ground) For this course, all scale statements will be assumed unit-to-unit

7. Scale Issues large scale vs. small scaleTo a geographer:1:2,000,000 is small scale1:200 is large scale

8. Importance of Scale Scale of data plays an important role, and frequently causes problems All spatial phenomena have scale dependent behavior/properties Be aware of: Data source scale Mixing data from different source scales Appropriateness of output scale

9. Scale Issues Data from different sources and scales can vary widely 1:100,000 scale data from USGS DLG

10. Scale Issues 1:1,000,000 scale data from DCW (DMA)

11. Scale Issues 1:2,000,000 scale data from USGS DLG

12. Using Color

13. Displaying data: colors What can color do? Label Measure Represent or imitate reality Beautify From Tufte 1990 Wabern, 1983

14. Displaying data: colors Primary home heating fuel. U.S. Department of Commerce From Tufte 1990

15. Displaying data: colors Primary home heating fuel. U.S. Department of Commerce From Tufte 1990

16. Displaying data: colors From Tufte 1997

17. Displaying data: colors From Tufte 1997

18. Displaying data: colors From Tufte 1997

19. Color Blindness

20. Color Blindness

21. Color Blindness http://jfly.iam.u-tokyo.ac.jp/color/

22. Color Blindness http://jfly.iam.u-tokyo.ac.jp/color/

23. Color Blindness http://jfly.iam.u-tokyo.ac.jp/color/

24. Color Blindness http://jfly.iam.u-tokyo.ac.jp/color/

25. Color Blindness http://jfly.iam.u-tokyo.ac.jp/color/

26. Color Models RGB

27. Color Models CMYK

28. Redundant Coding

29. Redundant Coding http://jfly.iam.u-tokyo.ac.jp/color/

30. Redundant Coding http://jfly.iam.u-tokyo.ac.jp/color/

31. Color Schemes

32. Color Schemes Dr. Cynthia Brewer / Department of Geography / The Pennsylvania State University http://www.personal.psu.edu/faculty/c/a/cab38/ColorSch/Schemes.html

33. Color Schemes Dr. Cynthia Brewer / Department of Geography / The Pennsylvania State University http://www.personal.psu.edu/faculty/c/a/cab38/ColorSch/Schemes.html

34. Color Schemes Dr. Cynthia Brewer / Department of Geography / The Pennsylvania State University http://www.personal.psu.edu/faculty/c/a/cab38/ColorSch/Schemes.html

35. Color Schemes Dr. Cynthia Brewer / Department of Geography / The Pennsylvania State University http://www.personal.psu.edu/faculty/c/a/cab38/ColorSch/Schemes.html

36. Color Schemes Dr. Cynthia Brewer / Department of Geography / The Pennsylvania State University http://www.personal.psu.edu/faculty/c/a/cab38/ColorSch/Schemes.html

37. Color Schemes Dr. Cynthia Brewer / Department of Geography / The Pennsylvania State University http://www.personal.psu.edu/faculty/c/a/cab38/ColorSch/Schemes.html

38. Color Schemes Dr. Cynthia Brewer / Department of Geography / The Pennsylvania State University http://www.personal.psu.edu/faculty/c/a/cab38/ColorSch/Schemes.html

39. Color Schemes Dr. Cynthia Brewer / Department of Geography / The Pennsylvania State University http://www.personal.psu.edu/faculty/c/a/cab38/ColorSch/Schemes.html

40. Color Schemes Dr. Cynthia Brewer / Department of Geography / The Pennsylvania State University http://www.personal.psu.edu/faculty/c/a/cab38/ColorSch/Schemes.html

41. Color Schemes Dr. Cynthia Brewer / Department of Geography / The Pennsylvania State University http://www.personal.psu.edu/faculty/c/a/cab38/ColorSch/Schemes.html

42. Color Schemes Dr. Cynthia Brewer / Department of Geography / The Pennsylvania State University http://www.personal.psu.edu/faculty/c/a/cab38/ColorSch/Schemes.html

43. Color Schemes Dr. Cynthia Brewer / Department of Geography / The Pennsylvania State University http://www.personal.psu.edu/faculty/c/a/cab38/ColorSch/Schemes.html

44. Color Schemes Dr. Cynthia Brewer / Department of Geography / The Pennsylvania State University http://www.personal.psu.edu/faculty/c/a/cab38/ColorSch/Schemes.html

45. Color Schemes Dr. Cynthia Brewer / Department of Geography / The Pennsylvania State University http://www.personal.psu.edu/faculty/c/a/cab38/ColorSch/Schemes.html

46. Color Schemes Dr. Cynthia Brewer / Department of Geography / The Pennsylvania State University http://www.personal.psu.edu/faculty/c/a/cab38/ColorSch/Schemes.html

47. Color Schemes Dr. Cynthia Brewer / Department of Geography / The Pennsylvania State University http://www.personal.psu.edu/faculty/c/a/cab38/ColorSch/Schemes.html

48. Dr. Cynthia Brewer / Department of Geography / The Pennsylvania State University http://www.personal.psu.edu/cab38/ColorBrewer/ColorBrewer.html

49. Specifying Colors in ArcMap

50. Homework Read: “Creating Feature Datasets & Vector Editing” & “Creating and Modifying Tables” Start working on assignment #4 -- Due April 26.