Map reading (1)
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The document discusses the key components of a topographic map, including cardinal directions, grid references, contours, and symbols. It explains that cardinal directions indicate compass directions, grids are used to reference specific areas using eastings and northings, contours connect areas of equal height to show terrain features, and symbols represent physical objects and features on the map. The document uses examples and practice questions to demonstrate how to interpret and reference locations on a topographic map.
Map reading (1)
- 2. what is a topographic map? A map that shows an area with a lot of details - height of land, gradient - shape - human features
- 3. Example:
- 4. parts of a topographic map 1) Cardinal Directions 2) Eastings, Northings, 4 Figure Grid Reference 3) Contours 4) Symbols to represent things
- 5. parts of a topographic map 1) Cardinal Directions 2) Eastings, Northings, 4 Figure Grid Reference 3) Contours 4) Symbols to represent things
- 6. parts of a topographic map 1) Cardinal Directions = basic compass directions (north, south, east, west)
- 7. parts of a topographic map 1) Cardinal Directions North South EastWest
- 8. parts of a topographic map 1) Cardinal Directions North South EastWest North-West North-East South-East South-West
- 9. parts of a topographic map 1) Cardinal Directions let's try
- 10. parts of a topographic map What is the direction of Sun Plaza from Sembawang Sec?
- 11. parts of a topographic map What is the direction of Sun Plaza from Sembawang Sec?
- 12. parts of a topographic map What is the direction of Sun Plaza from Sembawang Sec?
- 13. parts of a topographic map What is the direction of Sun Plaza from Sembawang Sec? North East!
- 14. parts of a topographic map What is the direction of Blk 331 from Sembawang Sec?
- 15. parts of a topographic map What is the direction of Blk 331 from Sembawang Sec?
- 16. parts of a topographic map What is the direction of Blk 331 from Sembawang Sec?
- 17. parts of a topographic map What is the direction of Blk 331 from Sembawang Sec? North!
- 18. parts of a topographic map What is the direction of Sembawang Sec from Blk 331?
- 19. parts of a topographic map What is the direction of Sembawang Sec from Blk 331?
- 20. parts of a topographic map What is the direction of Sembawang Sec from Blk 331?
- 21. parts of a topographic map What is the direction of Sembawang Sec from Blk 331?
- 22. parts of a topographic map What is the direction of Sembawang Sec from Blk 331? South!!
- 23. parts of a topographic map 1) Cardinal Directions Don't forget the word "FROM"
- 24. parts of a topographic map 1) Cardinal Directions Don't forget the word "FROM" you put the compass at the "from" location
- 25. parts of a topographic map 1) Cardinal Directions eg: How do you get to Sun Plaza FROM Sembawang Sec You don't ask people to start from Sun Plaza right? Same idea here for directions. :)
- 26. parts of a topographic map 1) Cardinal Directions 2) Eastings, Northings, 4 Figure Grid Reference 3) Contours 4) Symbols to represent things
- 27. parts of a topographic map Maps have grids to refer to different part of the map
- 28. parts of a topographic map Maps have grids to refer to different part of the map 1 square = 1 grid
- 29. parts of a topographic map Eastings = vertical line 40 41 42 43 44 45 46 40 41 42 43 44 45 46
- 30. parts of a topographic map Eastings = vertical line Northings = horizontal line 40 41 42 43 44 45 46 40 41 42 43 44 45 46 19 18 17 16 15 14 13 19 18 17 16 15 14 13
- 31. Ways to refer to location on the map
- 32. parts of a topographic map Eastings = vertical line Northings = horizontal line 40 41 42 43 44 45 46 40 41 42 43 44 45 46 19 18 17 16 15 14 13 19 18 17 16 15 14 13 Refer to the area bounded by Easting 41 and 45, Northings 17 and 16
- 33. parts of a topographic map Eastings = vertical line Northings = horizontal line 40 41 42 43 44 45 46 40 41 42 43 44 45 46 19 18 17 16 15 14 13 19 18 17 16 15 14 13 Refer to the area bounded by Easting 41 and 45, Northings 17 and 16
- 34. parts of a topographic map Eastings = vertical line Northings = horizontal line 40 41 42 43 44 45 46 40 41 42 43 44 45 46 19 18 17 16 15 14 13 19 18 17 16 15 14 13 Refer to the area bounded by Easting 41 and 45, Northings 17 and 16
- 35. parts of a topographic map Eastings = vertical line Northings = horizontal line 40 41 42 43 44 45 46 40 41 42 43 44 45 46 19 18 17 16 15 14 13 19 18 17 16 15 14 13 Refer to the area shown in Fig. 1 Fig. 1 42 43 42 43 18 16 18 16
- 36. parts of a topographic map Eastings = vertical line Northings = horizontal line 40 41 42 43 44 45 46 40 41 42 43 44 45 46 19 18 17 16 15 14 13 19 18 17 16 15 14 13 Refer to the area shown in Fig. 1 Fig. 1 42 43 42 43 18 16 18 16
- 37. parts of a topographic map Eastings = vertical line Northings = horizontal line 40 41 42 43 44 45 46 40 41 42 43 44 45 46 19 18 17 16 15 14 13 19 18 17 16 15 14 13 Refer to the area shown in Fig. 1 Fig. 1 42 43 42 43 18 16 18 16
- 38. What if I just want to refer to 1 grid? We use the 4 figure grid reference
- 39. parts of a topographic map Eg: I want to refer to the grid in yellow
- 40. parts of a topographic map refer to the bottom left corner of the grid
- 41. parts of a topographic map refer to the bottom left corner of the grid Get Northings and Easting of bottom left corner 42 16
- 42. parts of a topographic map refer to the bottom left corner of the grid Get Northings and Easting of bottom left corner 42 16 Put the numbers as 4 figures - Eastings then Northings
- 43. parts of a topographic map refer to the bottom left corner of the grid Get Northings and Easting of bottom left corner 42 16 Put the numbers as 4 figures - Eastings then Northings 4216
- 44. parts of a topographic map To remember, use the LEFT HAND RULE 42 16
- 45. parts of a topographic map Now you practice What is the 4 fig. grid reference of the peak of Mt Lala?
- 46. parts of a topographic map Now you practice What is the 4 fig. grid reference of the peak of Mt Lala?
- 47. parts of a topographic map Now you practice What is the 4 fig. grid reference of the peak of Mt Lala? 4317
- 48. parts of a topographic map Now you practice What is the 4 fig. grid reference of the Warning System?
- 49. parts of a topographic map Now you practice What is the 4 fig. grid reference of the Warning System?
- 50. parts of a topographic map Now you practice What is the 4 fig. grid reference of the Warning System? 4314
- 51. parts of a topographic map 1) Cardinal Directions 2) Eastings, Northings, 4 Figure Grid Reference 3) Contours 4) Symbols to represent things
- 52. parts of a topographic map Contours: Imaginary Lines that join the same height together
- 53. parts of a topographic map Contours: Imaginary Lines that join the same height together 50m 50m 50m 100m 100m
- 54. parts of a topographic map Contours: We see the line from the top view and put it on the map
- 55. parts of a topographic map Contours: to represent height, gradient and shape
- 56. parts of a topographic map Contours: if contour lines are closer, it means the gradient is steeper or more gentle?
- 57. parts of a topographic map if contour lines are closer, it means the gradient is steeper or more gentle? Steep or gentle?
- 58. parts of a topographic map Steep gradient as contour lines are close together
- 59. parts of a topographic map Steep or gentle?
- 60. parts of a topographic map Gentle as contour lines are far apart
- 61. parts of a topographic map Do the hand out