# Topographic Maps Practice Questions and Answers Revised October 2007

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1 Topographic Maps Practice Questions and Answers Revised October In the illustration shown below what navigational features are represented by A, B, and C? Note that A is a critical city in defining the navigational feature labeled B. 2. If you are located on zero degrees latitude, then you are on the. 3. Lines of longitude run and. 4. The prime meridian lies at degrees. 5. The prime meridian passes through, England. 6. Longitude is measured in degrees or of the prime meridian. 7. Latitude is measured in degrees or of the equator. 8. One degree of latitude equals a seconds b seconds c. 60 seconds d. 1 second

2 9. One minute of longitude equals a seconds b seconds c. 60 seconds d second 10. One degree of longitude equals a minutes b minutes c minutes d. 60 minutes e. None of the above 11. Topographic maps that are bounded by lines of latitude and longitude are called maps. 12. How many 7.5 minute quadrangles occur within a 15 minute sheet? a. 5 b. 2 c. 3 d Where would you find the title of a 7.5 minute quadrangle? a. top right corner b. top left corner c. lower right corner d. lower left corner e. lower center 14. Where would you find the scale of a 7.5 minute quadrangle? a. lower right margin b. lower left margin c. middle lower margin d. middle upper margin 15. A 7.5 minute quadrangle covers how many degrees of longitude and latitude?

3 16. On a 7.5 minute quadrangle where can information about magnetic declination be found? a. lower right margin b. lower left margin c. middle lower margin d. middle upper margin 17. Please fill in the answers to (a) and (b). 18. In the following township, what section lies to the south of Sec. 12?

4 19. Please answer questions (a) and (b) on the following illustration. 20. In the following township what sections lie immediately to the north and to the south of Sec. 8? 21. In the following illustration of Sec. 21 from a T1N-R1E, how would you describe the location of the house?

5 22. In the following illustration of Sec. 32 from T3S-R2W, how would you describe the location of the house? 23. What kind of scale is shown below? 24. How many feet are there in an inch on a map if the scale is 1:24000? 25. How many feet are there in an inch on a map if the scale is 1:12000? 26. Magnetic North lies in what direction relative to geographic North if the magnetic declination is 14 degrees East? 27. What is the Bruton compass used to measure? 28. The North end of the compass needle ALWAYS points toward what direction? 29. If the magnetic declination is properly adjusted, then when the compass needle reads zero degrees, the sighting arm points in what direction? 30. The index pin is used to adjust what feature on the Bruton compass? 31. Is magnetic North a stationary fixed point on the globe?

6 32. What kind of topographic landform is represented in the following illustration? 33. For the illustration in question #32 what are the bold contours called? 34. For the illustration in question #32 what is the contour interval? 35. What kind of topographic landform is represented in the following illustration? 36. For the illustration in question #35 what is the contour interval?

7 37. What kind of topographic landform is represented in the following illustration? 38. Topographic contour lines that are closer together than other contour lines indicate what? 39. If you were asked what do individual topographic contours on a given 7.5 minute quadrangle indicate, how would you respond? 40. What do contour lines that are uniformly spaced indicate?

8 Answers 1. A = Greenwish, England; B = prime meridian (0 o longitude); C = equator (0 o latitude) 2. equator 3. north, south 4. 0, longitude 5. Greenwich 6. East, West 7. North, South 8. a seconds (one degree equals 60 minutes; one minute equals 60 seconds; 60 times 60 equals 3600 seconds) 9. c. 60 seconds 10. d. 60 minutes 11. quadrangle 12. d a. top right corner 14. c. middle lower margin minutes of both longitude and latitude 16. b. lower left margin. 17. (a) = 6 miles; (b) = 6 miles 18. Sec (a) = 1 mile; (b) = 1 mile 20. Sec. 5 lies to the north; Sec. 17 lies to the south. 21. NE1/4, Sec. 21, T1N-R1E 22. SW1/4, Sec. 32, T3S-R2W 23. The image is a graphical scale feet in an inch - Use the relationship that there are 12 inches in a foot. Hence, inches divided by 12 inches yields 2000 feet feet. See answer to question 24 for explanation of how to calculate this value degrees east of geographic north 27. directions 28. magnetic North 29. North 30. The index pin is used to adjust the circular grid for magnetic declination 31. No, magnetic North is constantly moving. 32. hill or mountain 33. index contour ( = 200 ; 200 /5 = 40 ) 35. valley or ravine ( = 100 ; 100 /4 = 25 ) 37. ridge 38. steeper slopes 39. Each topographic contour represents a curve of equal elevation. In other words, if you were to walk along a given contour, then you would be walking along a horizontal surface 40. a constant slope

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