Atonement

Assignment 2

Part A: Reading topographic maps

Map 1: 41-I, Sudbury

1. Is this a topographic map? Yes
2. Map title? Sudbury Ontario
3. Scale? 1: 250 000
4. Contour interval? 50 meters
5. Index number of adjoining map directly to the East? 31L
6. Give the latitude and longitude of the SW corner of the map, to the nearest minute? 46˚ 00’, 82˚ 00’
7. Latitude and longitude of the intersection between road 144 and the Canadian Pacific (CP) Railway near Benny and Geneva, to the nearest minute? 46˚ 46’ N, 81˚ 36’ W
8. What feature is at 46˚ 25’ 00” N, 81˚ 18’ 30” W? Gordon Lake
9. What feature is at 46˚ 30’ 00”N, 81˚ 25’ 00”W? Ratter Lake

Map 2: 41-I/11 Chelmsford

1. Is this a topographic map? Yes
2. Map title? Chelmsford Ontario
3. Scale? 1: 50 000
4. Datum and projection? North America 1983, Transvers Mercator Projection
5. Contour interval? 50 feet
6. Elevation difference between index contours? 1000
7. What is the civilian UTM grid zone designation for this map? One thousand meter UTM zone 17
8. Give the civilian UTM coordinates of the upper right corner of the map? 499 000m,E., 517 600m, N.
9. What is UTM coordinates 17T, 469 700, 5 165 600? Levack Reservoir
10. What is the elevation difference between 17T, 476 100, 5 165 000 and 17T, 475 000, 5 166 000? Please show work. 1300 – 1125 = 175

Part B: Map scales

1. Would a given feature appear larger in a 1: 10 000 map or on a 1: 50 000 map? A given feature will appear larger on a 1: 10 000 map.
2. What map scale would be appropriate to map the Greater Sudbury area? 1: 250 000
3. What map scale would be appropriate to map North America in an Atlas? 25 million
4. Given a map scale of 1: 50 000, five centimeters in the map represents how many meters on the ground? Please show your work and express your answer in meters. (5 map cm) x (50 000 ground cm/1 map cm) x (1m/100 cm) = 2 500 m on the ground
5. Given a map scale of 1: 10 000, half a kilometer on the ground covers how many centimeters on the map? Please show your work and express your answers in centimeters. (500 ground m) x (1 map m/10 000 ground m) x (100 cm/1m) = 5 cm on the map

Part C: Contour lines

1. What is the scale for Figure 2? Please show your work, and present your answer as a representative fraction, to the nearest 100 (e.g. 1: 78 500). 14.6 page cm: 600 000 real cm. the scale for figure 2 is, 1: 41 100 (600 000/14.6)
2. What is scale along the x-axis for figure 3? The scale along the x-axis is also 1: 41 000
3. What is the scale along the y-axis for figure 3? Please show your work. 6.6 page cm: 9 000 real cm. 9 000/6.6 = 1 300. The scale along the y-axis is 1:1 300
4. When drawing topographic profiles, landforms often look steeper than actually are because of the difference between the horizontal and vertical scales, which may result in an exaggeration of elevation in comparison to horizontal distances on the graph. This is called vertical exaggeration. This vertical exaggeration factor of a profile is the ratio of the vertical to the horizontal scale. What is the vertical exaggeration factor for figure 3? Please show your work, and remember that, when you divide the vertical scale by the horizontal scale, you are dividing two fractions? 1/ 1 300 x 41 100 = 41 100/ 1 300 = 32. The vertical exaggeration factor for figure 3 is 32.