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Basic Reference Certificate Geography Revision Exercises – Issues & Map-Reading P.49-76

Basic Reference Certificate Geography Revision Exercises – Issues & Map-Reading P.49-76. HKCEE MAP READING SKILLS :. Basic Map Reading Skills: Check List. Conventional Signs Grid References Scales Direction Gradient Cross-section & Relief Features. Conventional Signs . Reference - WB:49.

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Basic Reference Certificate Geography Revision Exercises – Issues & Map-Reading P.49-76

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  1. Basic ReferenceCertificate Geography Revision Exercises –Issues & Map-Reading P.49-76 HKCEEMAP READINGSKILLS:

  2. Basic Map Reading Skills:Check List • Conventional Signs • Grid References • Scales • Direction • Gradient • Cross-section & Relief Features

  3. Conventional Signs • Reference - WB:49

  4. Conventional Signs • Reference - WB:49

  5. Conventional Signs • Reference - WB:49

  6. Conventional Signs • Reference - WB:49

  7. Conventional Signs • Reference - WB:49

  8. Conventional Signs • Reference - WB:49

  9. Grid References (WB:51-52) • to tell locations on a map • two sets of lines • vertical – eastings (number values increase eastwards) • horizontal – northings (number values increase northwards) • grid square  4-figure • location  6-figure

  10. Grid References

  11. Grid References(WB:53) 147343 1132

  12. Scale (WB:54-55) • to show the number of times that the actual size of the ground has been reduced • helps us find out real distance / area from the map

  13. Scale • Statement Scale • describes the scale in words • e.g. 1 cm to 200m • Representative Fraction (R.F.) • shows scale in the form of a fraction / ratio • e.g. 1:20000 • Linear Scale • uses a line to show the scale • e.g.

  14. Direction • Reference – WB:59

  15. Direction • Reference – WB:59

  16. Direction • Reference – WB:60

  17. Cross Section

  18. Cross Section

  19. Cross Section

  20. Cross Section

  21. Cross Section

  22. Vertical Exaggeration • Reference – WB:72

  23. Vertical Exaggeration

  24. Vertical Exaggeration

  25. Relief Features • Reference – WB:65-68

  26. Relief Features

  27. Relief Features

  28. Relief Features

  29. Relief Features

  30. Relief Features

  31. gentle slope • steep slope • concave slope • convex slope • stepped slope • spur • valley • hill • ridge • saddle

  32. Gradient

  33. Gradient

  34. Gradient

  35. Gradient

  36. A B Calculate the Average Gradient of the Stream from A (source) to B (bridge) A: 340m Gradient: 1 in HD/VD HD: measured actual length of the red line is 7.5cm Map Scale is 1 : 20000 Actual Distance: (7.5 X 200)m = 1500m B: 80m VD: 340m – 80m =260m Gradient: 1 in 1500m/260m = 1 in 5.8

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